Contacts of the helix formed by residues 777 - 804 (chain Z) in PDB entry 5WTI
Residue contacts within the protein are
derived with the CSU software (Sobolev V., Sorokine A.,
Prilusky J., Abola E.E. and Edelman M. (1999) Automated
analysis of interatomic contacts in proteins.
Bioinformatics, 15, 327-332). A
short description of the analytical approach
is given at the end of the page.
Note:
Non-standard 3 letter residue
codes indicate a heterogroup. To identify
and analyse, use LPC software
Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC - hydrophobic-hydrophilic contact (destabilizing contact)
+/- - indicates presence/absence of a specific contacts
* - indicates residues forming contacts by their side chain
(including CA atoms)
Residues in contact with ALA 777 (chain Z).
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
61B A 3.1 22.4 + - - +
62B A 3.2 8.9 + - - -
726Z ARG* 5.5 5.4 - - - +
751Z ARG* 3.0 23.5 + - - +
754Z LEU* 5.5 1.6 - - + -
776Z PHE* 1.3 89.3 - - + +
778Z ILE* 1.3 67.1 + - - +
779Z ASP 3.4 2.5 - - - -
780Z GLN* 3.3 22.5 + - + +
781Z LEU* 3.1 11.6 + - - +
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Residues in contact with ILE 778 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
62B A 2.9 21.6 + - - +
63B C 4.2 8.1 - - - +
495Z ARG* 3.5 49.6 - - + +
775Z ARG* 3.7 61.9 - - + +
776Z PHE 4.2 3.6 - - - -
777Z ALA* 1.3 71.2 - - - +
779Z ASP* 1.3 52.4 + - - +
781Z LEU* 2.9 8.9 + - + +
782Z ASN* 2.7 45.7 + - - +
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Residues in contact with ASP 779 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
49B A 4.4 17.6 + - - +
62B A 4.6 1.2 + - - -
495Z ARG* 2.9 31.9 + - - -
777Z ALA 3.4 0.4 - - - -
778Z ILE* 1.3 76.2 - - - +
780Z GLN* 1.3 56.7 + - - +
782Z ASN* 3.7 11.8 + - - +
783Z HIS* 3.0 29.3 + - - +
----------------------------------------------------------
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Residues in contact with GLN 780 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
48B C 2.5 45.0 + - - +
726Z ARG* 4.8 11.8 - - - +
729Z LEU* 4.8 2.2 - - - +
747Z ILE* 4.1 14.4 + - + +
750Z THR* 4.0 15.0 - - - +
751Z ARG* 3.1 38.1 - - + +
754Z LEU* 4.0 11.4 - - - +
777Z ALA* 3.3 20.9 + - + +
778Z ILE 3.2 0.8 - - - -
779Z ASP* 1.3 78.1 - - - +
781Z LEU* 1.3 58.5 + - - +
783Z HIS* 3.9 4.8 - - - +
784Z LEU* 3.0 26.3 + - - +
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Residues in contact with LEU 781 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
10E C 3.8 38.8 - - + +
11E T 4.3 6.7 - - - +
751Z ARG* 3.9 35.9 - - - +
775Z ARG* 5.1 13.5 - - - +
776Z PHE 5.2 1.3 - - - +
777Z ALA 3.1 12.1 + - - +
778Z ILE* 2.9 9.9 + - - +
780Z GLN* 1.3 75.0 - - - +
782Z ASN* 1.3 66.3 + - - +
784Z LEU* 3.7 13.6 - - + +
785Z ASN* 2.9 47.1 + - - +
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Residues in contact with ASN 782 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
491Z ASP* 4.0 30.8 + - - +
495Z ARG* 5.1 1.2 - - - +
775Z ARG* 4.7 5.9 + - - -
778Z ILE* 2.7 37.3 + - - +
779Z ASP* 3.7 14.6 + - - +
781Z LEU* 1.3 73.9 - - - +
783Z HIS* 1.3 56.9 + - - +
785Z ASN* 3.2 9.4 + - - +
786Z ALA* 2.9 29.8 + - - +
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Residues in contact with HIS 783 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
45B C 2.6 37.7 + - - +
46B U 3.2 40.2 + - - -
48B C 3.0 43.9 + - - +
49B A 4.8 7.4 + - - +
747Z ILE* 3.6 25.9 - - + +
779Z ASP 3.0 17.9 + - - +
780Z GLN* 3.9 4.7 - - - +
781Z LEU 3.3 0.2 - - - -
782Z ASN* 1.3 76.4 - - - +
784Z LEU* 1.3 57.3 + - - +
786Z ALA* 3.7 0.4 - - - +
787Z LEU* 2.9 30.4 + - + +
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Residues in contact with LEU 784 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
744Z ILE* 3.7 28.8 - - + +
747Z ILE* 4.0 22.0 - - + +
748Z ASP* 3.8 35.0 - - + +
751Z ARG* 4.5 16.2 - - - -
780Z GLN 3.0 18.0 + - - +
781Z LEU* 3.7 14.6 - - + +
783Z HIS* 1.3 80.4 - - - +
785Z ASN* 1.3 65.1 + - - +
787Z LEU* 3.6 7.6 + - - +
788Z LYS* 3.3 21.0 + - + +
849Z LYS* 6.0 0.9 - - + -
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Residues in contact with ASN 785 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
11E T 3.2 39.3 + - - +
12E T 4.6 9.7 + - - -
781Z LEU* 2.9 35.5 + - - +
782Z ASN* 3.7 8.4 + - - +
784Z LEU* 1.3 78.7 - - - +
786Z ALA* 1.3 59.8 + - - +
788Z LYS* 3.2 6.9 + - - +
789Z GLU* 2.9 30.0 + - - +
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Residues in contact with ALA 786 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
44B G 3.2 39.7 + - - +
45B C 3.8 6.3 - - - +
782Z ASN 2.9 17.0 + - - +
783Z HIS 3.2 3.6 + - - +
785Z ASN* 1.3 75.0 - - - +
787Z LEU* 1.3 57.8 + - - +
789Z GLU* 3.4 12.2 + - - +
790Z ASP* 2.9 30.8 + - - +
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Residues in contact with LEU 787 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
45B C 3.5 38.3 - - - +
46B U 3.9 2.7 - - - +
739Z ILE* 4.2 20.6 - - + -
743Z ASN* 3.5 39.7 - - + +
744Z ILE* 3.8 23.6 - - + +
747Z ILE* 3.9 16.6 - - + -
783Z HIS* 2.9 18.7 + - + +
784Z LEU* 3.9 5.2 - - - +
786Z ALA* 1.3 77.3 - - - +
788Z LYS* 1.3 57.1 + - - +
790Z ASP 3.4 0.7 + - - -
791Z ARG* 2.9 26.5 + - + +
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Residues in contact with LYS 788 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
12E T 4.2 15.3 - - - +
741Z LEU* 4.5 0.6 - - - +
744Z ILE* 3.7 23.8 - - + -
784Z LEU* 3.3 13.8 + - + +
785Z ASN* 3.2 11.2 + - - +
787Z LEU* 1.3 76.8 - - - +
789Z GLU* 1.3 66.0 + - - +
791Z ARG* 3.4 32.4 + - - +
792Z LEU* 3.2 50.9 + - + +
849Z LYS* 3.4 22.8 + - - +
850Z TRP 3.5 7.6 + - - -
851Z SER* 3.2 32.1 - - - +
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Residues in contact with GLU 789 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
44B G 4.9 5.2 + - - -
104B G 5.0 2.3 + - - +
785Z ASN 2.9 16.3 + - - +
786Z ALA* 3.7 11.4 - - - +
788Z LYS* 1.3 77.2 - - - +
790Z ASP* 1.3 61.2 + - - +
791Z ARG 3.4 0.2 + - - -
792Z LEU* 3.4 7.2 + - - +
793Z LYS* 3.1 49.8 + - + +
858Z GLN* 5.3 2.9 + - - +
1201Z MG 2.3 30.4 - - - -
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Residues in contact with ASP 790 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
44B G 2.9 29.5 + - - +
45B C 2.8 39.4 + - - +
101B A 4.0 7.6 + - - +
739Z ILE* 3.9 2.8 - - - +
786Z ALA 2.9 17.5 + - - +
787Z LEU 3.8 4.3 - - - +
789Z GLU* 1.3 78.1 - - - +
791Z ARG* 1.3 62.3 + - - +
793Z LYS* 4.0 8.0 - - - +
794Z LYS* 3.1 50.1 + - - +
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Residues in contact with ARG 791 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
576Z GLY 5.3 3.4 + - - -
577Z GLN 5.4 1.4 + - - -
579Z GLN 5.2 2.0 + - - -
580Z ALA* 4.7 4.6 + - - +
620Z LEU* 3.8 14.6 - - + +
623Z GLU* 2.9 28.3 + - - -
739Z ILE* 3.2 39.1 + - + +
740Z SER* 4.0 6.2 - - - +
741Z LEU* 3.5 42.6 - - - +
744Z ILE* 4.3 7.0 - - - -
787Z LEU* 2.9 19.1 + - + +
788Z LYS* 3.7 22.5 - - - +
789Z GLU 3.2 0.4 - - - -
790Z ASP* 1.3 78.0 - - - +
792Z LEU* 1.3 57.4 + - - +
794Z LYS* 3.9 1.7 - - - +
795Z MET* 2.9 51.8 + - + +
850Z TRP* 5.3 8.5 + - - +
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Residues in contact with LEU 792 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
788Z LYS* 3.2 53.4 + - + +
789Z GLU* 3.4 4.5 + - - +
790Z ASP 3.4 0.4 - - - -
791Z ARG* 1.3 75.0 - - + +
793Z LYS* 1.3 61.6 + - - +
795Z MET* 3.9 9.3 - - + +
796Z ALA* 2.9 31.9 + - - +
850Z TRP 4.4 1.6 - - - +
851Z SER* 3.5 31.9 - - - +
854Z GLU* 4.2 16.8 - - + +
855Z ILE* 3.5 27.4 - - + +
858Z GLN* 3.7 16.7 - - - +
----------------------------------------------------------
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Residues in contact with LYS 793 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
43B U 5.4 4.2 + - - -
101B A 3.3 20.6 + - - +
102B C 3.2 40.9 + - - +
104B G 3.3 22.5 + - - -
789Z GLU* 3.1 55.9 + - + +
790Z ASP* 4.0 7.6 - - - +
792Z LEU* 1.3 77.1 - - - +
794Z LYS* 1.3 56.9 + - + +
797Z ASN* 3.1 27.7 + - - +
858Z GLN* 3.6 22.0 - - - +
862Z GLN* 3.6 7.7 + - - +
1201Z MG 3.8 5.5 - - - -
----------------------------------------------------------
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Residues in contact with LYS 794 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
3B A 5.1 8.8 - - - +
44B G 3.7 1.1 - - - +
45B C 3.2 15.4 + - - -
46B U 4.8 1.2 + - - -
99B G 3.9 6.1 - - - +
100B C 3.0 47.3 + - - +
101B A 3.6 24.5 - - - +
620Z LEU* 4.9 1.3 - - + -
621Z PRO* 6.2 0.2 - - + -
739Z ILE* 3.8 28.8 - - + +
790Z ASP* 3.1 44.5 + - - +
791Z ARG 4.0 2.9 - - - +
793Z LYS* 1.3 74.1 - - - +
795Z MET* 1.3 61.5 + - - +
797Z ASN* 3.5 5.2 + - - +
798Z THR* 2.8 35.5 + - - +
----------------------------------------------------------
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Residues in contact with MET 795 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
575Z LEU* 4.8 0.7 - - - -
580Z ALA* 4.1 29.6 - - + +
618Z ILE* 5.8 0.9 - - + -
620Z LEU* 3.9 16.5 - - + +
791Z ARG* 2.9 57.7 + - + +
792Z LEU* 3.9 8.7 - - + +
794Z LYS* 1.3 74.9 - - - +
796Z ALA* 1.3 60.2 + - - +
798Z THR* 3.3 5.9 + - - -
799Z ILE* 2.9 46.3 + - + +
855Z ILE* 3.5 41.7 - - + -
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Residues in contact with ALA 796 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
792Z LEU 2.9 18.8 + - - +
795Z MET* 1.3 76.2 - - - +
797Z ASN* 1.3 58.0 + - - +
799Z ILE* 3.4 3.0 + - - +
800Z ILE* 3.0 32.8 + - - +
855Z ILE* 4.5 4.9 - - - +
858Z GLN* 3.7 27.8 - - + +
859Z VAL* 3.6 23.1 - - + +
862Z GLN* 3.8 13.5 - - - +
----------------------------------------------------------
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Residues in contact with ASN 797 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
101B A 3.4 39.3 + - - +
102B C 3.3 20.2 + - - -
470Z ASP* 5.6 3.2 + - - -
472Z SER* 5.1 4.8 + - - -
473Z ILE* 6.0 1.0 - - - +
793Z LYS 3.1 18.8 + - - +
794Z LYS 3.8 3.9 - - - +
795Z MET 3.2 0.2 - - - -
796Z ALA* 1.3 74.8 - - - +
798Z THR* 1.3 68.6 + - - +
800Z ILE* 3.1 4.7 + - - +
801Z MET* 2.9 45.1 + - - +
815Z TRP* 4.5 4.2 - - - -
862Z GLN* 3.7 14.1 + - - +
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Residues in contact with THR 798 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
3B A 3.3 32.0 + - + +
4B G 5.2 0.9 + - - +
618Z ILE* 3.5 27.6 - - + -
619Z LYS 5.0 1.3 - - - +
620Z LEU* 4.0 5.0 - - + +
794Z LYS 2.8 24.6 + - - -
795Z MET* 3.3 6.9 + - - -
797Z ASN* 1.3 79.5 + - - +
799Z ILE* 1.3 63.3 + - - +
801Z MET* 3.3 4.2 + - - +
802Z HIS* 2.9 46.5 + - + -
815Z TRP* 5.0 7.5 - - + -
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Residues in contact with ILE 799 (chain Z).
Click here for Legend to table.
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Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
571Z MET* 4.3 3.2 - - - +
573Z ILE* 4.1 32.5 - - + -
575Z LEU* 4.7 2.0 - - + -
581Z ALA* 4.7 3.4 - - + -
618Z ILE* 4.5 23.3 - - + -
795Z MET* 2.9 33.7 + - + +
796Z ALA 3.7 4.0 - - - +
797Z ASN 3.2 0.2 - - - -
798Z THR* 1.3 76.2 - - - +
800Z ILE* 1.3 63.2 + - - +
802Z HIS* 3.6 1.7 + - - +
803Z ALA* 3.1 21.8 + - - +
825Z ILE* 4.5 6.5 - - + -
827Z PHE* 4.2 10.3 - - + -
855Z ILE* 3.9 28.0 - - + -
859Z VAL* 4.1 24.2 - - + -
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Residues in contact with ILE 800 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
473Z ILE* 4.8 4.7 - - + -
796Z ALA 3.0 21.9 + - - +
797Z ASN* 3.1 9.6 + - - +
799Z ILE* 1.3 76.6 - - - +
801Z MET* 1.3 65.8 + - - +
803Z ALA* 3.2 5.2 + - - +
804Z LEU* 2.9 48.2 + - + +
825Z ILE* 4.3 2.0 - - + -
859Z VAL* 3.4 36.8 - - + +
862Z GLN* 3.7 26.7 - - + +
863Z GLY* 3.5 18.6 - - - +
866Z TYR* 5.3 1.8 - - + -
868Z LEU* 4.1 12.1 - - + -
----------------------------------------------------------
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Residues in contact with MET 801 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
472Z SER* 4.0 9.6 - - - +
473Z ILE* 3.6 35.9 - - + -
797Z ASN* 2.9 39.2 + - - +
798Z THR 3.9 1.6 - - - +
799Z ILE 3.3 0.2 - - - -
800Z ILE* 1.3 80.2 - - - +
802Z HIS* 1.3 60.2 + - - +
804Z LEU* 3.3 4.4 + - - -
805Z GLY 3.1 4.5 + - - -
806Z TYR* 2.9 66.6 + - + +
815Z TRP* 3.6 47.1 - - + -
----------------------------------------------------------
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Residues in contact with HIS 802 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
17B G 3.1 22.4 + - - +
571Z MET* 4.0 10.4 - - + +
616Z PHE* 3.4 38.1 - + + -
617Z ASN 5.5 0.6 + - - -
618Z ILE* 3.9 18.0 - - + +
798Z THR* 2.9 45.4 + - + +
799Z ILE 4.0 2.9 - - - +
801Z MET* 1.3 75.7 - - - +
803Z ALA* 1.3 58.1 + - - +
805Z GLY 3.0 15.4 + - - -
806Z TYR 4.1 15.5 + - - -
807Z CYS* 5.7 2.9 - - + +
815Z TRP* 4.8 11.7 - + - -
----------------------------------------------------------
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Residues in contact with ALA 803 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
571Z MET* 3.7 18.3 - - - +
799Z ILE 3.1 19.0 + - - +
800Z ILE* 3.2 5.4 + - - +
802Z HIS* 1.3 76.7 - - - +
804Z LEU* 1.3 56.8 + - - +
820Z PRO 4.4 0.3 - - - +
821Z ALA* 3.3 2.4 - - - +
822Z CYS* 2.6 43.6 + - + +
825Z ILE* 3.6 30.3 - - + -
868Z LEU* 4.7 5.4 - - + -
----------------------------------------------------------
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Residues in contact with LEU 804 (chain Z).
Click here for Legend to table.
----------------------------------------------------------
Specific contacts
---------------------------
Residue Dist Surf HB Arom Phob DC
----------------------------------------------------------
473Z ILE* 3.7 27.6 - - + -
560Z GLY* 3.4 25.3 - - - -
561Z ILE* 3.7 31.2 - - + -
564Z LEU* 4.1 1.8 - - + -
800Z ILE* 2.9 30.2 + - + +
801Z MET* 3.8 5.4 - - - +
802Z HIS 3.1 0.6 - - - -
803Z ALA* 1.3 78.0 - - - +
805Z GLY* 1.3 58.5 + - - +
806Z TYR* 3.4 15.1 - - + -
821Z ALA* 3.5 21.6 - - + +
822Z CYS 4.8 0.2 - - - +
866Z TYR* 4.3 8.7 - - + -
868Z LEU* 3.9 33.4 - - + -
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A short description of the
analytical approach
The contact analysis used in this page
is based upon the approach
developed in:
Sobolev V., Wade R.C., Vriend G.
and Edelman M. PROTEINS (1996)
25, 120-129.
Contact legitimacy depends on the hydrophobic-hydrophilic
properties of the contacting atoms. In order to
define it, for each inter-atomic contact,
eight atom classes have been introduced:
I Hydrophilic - N and O that can donate and accept hydrogen bonds
(e.g., oxygen of hydroxyl group of Ser. or Thr)
II Acceptor - N or O that can only accept a hydrogen bond
III Donor - N that can only donate a hydrogen bond
IV Hydrophobic - Cl, Br, I and all C atoms that are not in
aromatic rings and do not have a covalent bond to
a N or O atom
V Aromatic - C in aromatic rings irrespective of any other
bonds formed by the atom
VI Neutral - C atoms that have a covalent bond to at least one
atom of class I or two or more atoms from class II
or III; atoms; S, F, P, and metal atoms in all cases
VII Neutral-donor - C atoms that have a covalent bond with only one
atom of class III
VIII Neutral-acceptor - C atoms that have a covalent bond with only
one atom of class II
For each pair of contacts the state of legitimacy
is shown below:
Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
Atomic class I II III IV V VI VII VIII
------------------------------------------------------------
I (Hydrophilic) + + + - + + + +
II (Acceptor) + - + - + + + -
III (Donor) + + - - + + - +
IV (Hydrophobic) - - - + + + + +
V (Aromatic) + + + + + + + +
VI (Neutral) + + + + + + + +
VII (Neutral-donor) + + - + + + - +
VIII (Neutral-acceptor) + - + + + + + -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically
assigned based on the atomic coordinates. However, in
three cases (see below) the automatic assignment
is currently ambiguous. In these
cases, the user is advised to manually analyse
the full list of contacts using
LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are
considered "aromatic" (Class V) if the ring is approximately
planar, and "hydrophobic" (Class IV) or "neutral" (Classes
VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
"hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
"carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).
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