HEADSC 2xev
COMMNT S2C correlation file created: Sat Mar 12 11:14:17 EST 2011
COMMNT
COMMNT If you use this database, please cite:
COMMNT
COMMNT Guoli Wang, Jonathan W. Arthur, and Roland L. Dunbrack, Jr.
COMMNT "S2C: A database correlating sequence and atomic
COMMNT coordinate numbering in the Protein Data Bank"
COMMNT dunbrack.fccc.edu/Guoli/s2c
COMMNT Copyright (c) February 2000, April 2002.
COMMNT
COMMNT SEQCRD columns are as follows:
COMMNT
COMMNT Column Positions Item
COMMNT 1 0-6 Record identifier
COMMNT 2 8 Chain
COMMNT 3 10 One letter residue code
COMMNT 4 12-14 SEQRES three letter residue code
COMMNT 5 16-18 ATOM three letter residue code
COMMNT 6 20-24 SEQRES residue number
COMMNT 7 26-31 ATOM residue number
COMMNT 8 33 PDB secondary structure
COMMNT 9 35 STRIDE secondary structure
COMMNT 10 37-43 Error flags
COMMNT
COMMNT Secondary structrue annotation:
COMMNT H: Helix E: Strand T: Turn
COMMNT B: Bridge G: 310Helix C: Coil
COMMNT
SEQCRD C M MET --- 1 - - - 367
SEQCRD C A ALA --- 2 - - - 367
SEQCRD C R ARG --- 3 - - - 367
SEQCRD C T THR THR 4 3 H C 45
SEQCRD C A ALA ALA 5 4 H H 4
SEQCRD C Y TYR TYR 6 5 H H 4
SEQCRD C N ASN ASN 7 6 H H 4
SEQCRD C V VAL VAL 8 7 H H 4
SEQCRD C A ALA ALA 9 8 H H 4
SEQCRD C F PHE PHE 10 9 H H 4
SEQCRD C D ASP ASP 11 10 H H 4
SEQCRD C A ALA ALA 12 11 H H 4
SEQCRD C L LEU LEU 13 12 H H 4
SEQCRD C K LYS LYS 14 13 H H 4
SEQCRD C N ASN ASN 15 14 H H 4
SEQCRD C G GLY GLY 16 15 C C 4
SEQCRD C K LYS LYS 17 16 H C 45
SEQCRD C Y TYR TYR 18 17 H H 4
SEQCRD C D ASP ASP 19 18 H H 4
SEQCRD C D ASP ASP 20 19 H H 4
SEQCRD C A ALA ALA 21 20 H H 4
SEQCRD C S SER SER 22 21 H H 4
SEQCRD C Q GLN GLN 23 22 H H 4
SEQCRD C L LEU LEU 24 23 H H 4
SEQCRD C F PHE PHE 25 24 H H 4
SEQCRD C L LEU LEU 26 25 H H 4
SEQCRD C S SER SER 27 26 H H 4
SEQCRD C F PHE PHE 28 27 H H 4
SEQCRD C L LEU LEU 29 28 H H 4
SEQCRD C E GLU GLU 30 29 H H 4
SEQCRD C L LEU LEU 31 30 H H 4
SEQCRD C Y TYR TYR 32 31 H T 45
SEQCRD C P PRO PRO 33 32 C T 45
SEQCRD C N ASN ASN 34 33 C T 45
SEQCRD C G GLY GLY 35 34 C T 45
SEQCRD C V VAL VAL 36 35 C C 4
SEQCRD C Y TYR TYR 37 36 H H 4
SEQCRD C T THR THR 38 37 H H 4
SEQCRD C P PRO PRO 39 38 H H 4
SEQCRD C N ASN ASN 40 39 H H 4
SEQCRD C A ALA ALA 41 40 H H 4
SEQCRD C L LEU LEU 42 41 H H 4
SEQCRD C Y TYR TYR 43 42 H H 4
SEQCRD C W TRP TRP 44 43 H H 4
SEQCRD C L LEU LEU 45 44 H H 4
SEQCRD C G GLY GLY 46 45 H H 4
SEQCRD C E GLU GLU 47 46 H H 4
SEQCRD C S SER SER 48 47 H H 4
SEQCRD C Y TYR TYR 49 48 H H 4
SEQCRD C Y TYR TYR 50 49 H H 4
SEQCRD C A ALA ALA 51 50 H H 4
SEQCRD C T THR THR 52 51 H H 4
SEQCRD C R ARG ARG 53 52 C C 4
SEQCRD C N ASN ASN 54 53 H C 45
SEQCRD C F PHE PHE 55 54 H H 4
SEQCRD C Q GLN GLN 56 55 H H 4
SEQCRD C L LEU LEU 57 56 H H 4
SEQCRD C A ALA ALA 58 57 H H 4
SEQCRD C E GLU GLU 59 58 H H 4
SEQCRD C A ALA ALA 60 59 H H 4
SEQCRD C Q GLN GLN 61 60 H H 4
SEQCRD C F PHE PHE 62 61 H H 4
SEQCRD C R ARG ARG 63 62 H H 4
SEQCRD C D ASP ASP 64 63 H H 4
SEQCRD C L LEU LEU 65 64 H H 4
SEQCRD C V VAL VAL 66 65 H H 4
SEQCRD C S SER SER 67 66 H H 4
SEQCRD C R ARG ARG 68 67 H H 4
SEQCRD C Y TYR TYR 69 68 H H 4
SEQCRD C P PRO PRO 70 69 C T 45
SEQCRD C T THR THR 71 70 C T 45
SEQCRD C H HIS HIS 72 71 C T 45
SEQCRD C D ASP ASP 73 72 C C 4
SEQCRD C K LYS LYS 74 73 H H 4
SEQCRD C A ALA ALA 75 74 H H 4
SEQCRD C A ALA ALA 76 75 H H 4
SEQCRD C G GLY GLY 77 76 H H 4
SEQCRD C G GLY GLY 78 77 H H 4
SEQCRD C L LEU LEU 79 78 H H 4
SEQCRD C L LEU LEU 80 79 H H 4
SEQCRD C K LYS LYS 81 80 H H 4
SEQCRD C L LEU LEU 82 81 H H 4
SEQCRD C G GLY GLY 83 82 H H 4
SEQCRD C L LEU LEU 84 83 H H 4
SEQCRD C S SER SER 85 84 H H 4
SEQCRD C Q GLN GLN 86 85 H H 4
SEQCRD C Y TYR TYR 87 86 H H 4
SEQCRD C G GLY GLY 88 87 H H 4
SEQCRD C E GLU GLU 89 88 H H 4
SEQCRD C G GLY GLY 90 89 H C 45
SEQCRD C K LYS LYS 91 90 H C 45
SEQCRD C N ASN ASN 92 91 H H 4
SEQCRD C T THR THR 93 92 H H 4
SEQCRD C E GLU GLU 94 93 H H 4
SEQCRD C A ALA ALA 95 94 H H 4
SEQCRD C Q GLN GLN 96 95 H H 4
SEQCRD C Q GLN GLN 97 96 H H 4
SEQCRD C T THR THR 98 97 H H 4
SEQCRD C L LEU LEU 99 98 H H 4
SEQCRD C Q GLN GLN 100 99 H H 4
SEQCRD C Q GLN GLN 101 100 H H 4
SEQCRD C V VAL VAL 102 101 H H 4
SEQCRD C A ALA ALA 103 102 H H 4
SEQCRD C T THR THR 104 103 H H 4
SEQCRD C Q GLN GLN 105 104 H H 4
SEQCRD C Y TYR TYR 106 105 H H 4
SEQCRD C P PRO PRO 107 106 C T 45
SEQCRD C G GLY GLY 108 107 C T 45
SEQCRD C S SER SER 109 108 H T 45
SEQCRD C D ASP ASP 110 109 H H 4
SEQCRD C A ALA ALA 111 110 H H 4
SEQCRD C A ALA ALA 112 111 H H 4
SEQCRD C R ARG ARG 113 112 H H 4
SEQCRD C V VAL VAL 114 113 H H 4
SEQCRD C A ALA ALA 115 114 H H 4
SEQCRD C Q GLN GLN 116 115 H H 4
SEQCRD C E GLU GLU 117 116 H H 4
SEQCRD C R ARG ARG 118 117 H H 4
SEQCRD C L LEU LEU 119 118 H H 4
SEQCRD C Q GLN GLN 120 119 H H 4
SEQCRD C S SER SER 121 120 H H 4
SEQCRD C I ILE ILE 122 121 H H 4
SEQCRD C R ARG ARG 123 122 H H 4
SEQCRD C L LEU LEU 124 123 H H 4
SEQCRD C G GLY GLY 125 124 C C 4
SEQCRD C Q GLN --- 126 - - - 367
SEQCRD C Q GLN --- 127 - - - 367
SEQCRD C L LEU --- 128 - - - 367
SEQCRD C R ARG --- 129 - - - 367
SEQCRD A M MET --- 1 - - - 367
SEQCRD A A ALA --- 2 - - - 367
SEQCRD A R ARG ARG 3 2 C C 4
SEQCRD A T THR THR 4 3 H C 45
SEQCRD A A ALA ALA 5 4 H H 4
SEQCRD A Y TYR TYR 6 5 H H 4
SEQCRD A N ASN ASN 7 6 H H 4
SEQCRD A V VAL VAL 8 7 H H 4
SEQCRD A A ALA ALA 9 8 H H 4
SEQCRD A F PHE PHE 10 9 H H 4
SEQCRD A D ASP ASP 11 10 H H 4
SEQCRD A A ALA ALA 12 11 H H 4
SEQCRD A L LEU LEU 13 12 H H 4
SEQCRD A K LYS LYS 14 13 H H 4
SEQCRD A N ASN ASN 15 14 H H 4
SEQCRD A G GLY GLY 16 15 C C 4
SEQCRD A K LYS LYS 17 16 H C 45
SEQCRD A Y TYR TYR 18 17 H H 4
SEQCRD A D ASP ASP 19 18 H H 4
SEQCRD A D ASP ASP 20 19 H H 4
SEQCRD A A ALA ALA 21 20 H H 4
SEQCRD A S SER SER 22 21 H H 4
SEQCRD A Q GLN GLN 23 22 H H 4
SEQCRD A L LEU LEU 24 23 H H 4
SEQCRD A F PHE PHE 25 24 H H 4
SEQCRD A L LEU LEU 26 25 H H 4
SEQCRD A S SER SER 27 26 H H 4
SEQCRD A F PHE PHE 28 27 H H 4
SEQCRD A L LEU LEU 29 28 H H 4
SEQCRD A E GLU GLU 30 29 H H 4
SEQCRD A L LEU LEU 31 30 H H 4
SEQCRD A Y TYR TYR 32 31 H T 45
SEQCRD A P PRO PRO 33 32 C T 45
SEQCRD A N ASN ASN 34 33 C T 45
SEQCRD A G GLY GLY 35 34 C T 45
SEQCRD A V VAL VAL 36 35 C C 4
SEQCRD A Y TYR TYR 37 36 H H 4
SEQCRD A T THR THR 38 37 H H 4
SEQCRD A P PRO PRO 39 38 H H 4
SEQCRD A N ASN ASN 40 39 H H 4
SEQCRD A A ALA ALA 41 40 H H 4
SEQCRD A L LEU LEU 42 41 H H 4
SEQCRD A Y TYR TYR 43 42 H H 4
SEQCRD A W TRP TRP 44 43 H H 4
SEQCRD A L LEU LEU 45 44 H H 4
SEQCRD A G GLY GLY 46 45 H H 4
SEQCRD A E GLU GLU 47 46 H H 4
SEQCRD A S SER SER 48 47 H H 4
SEQCRD A Y TYR TYR 49 48 H H 4
SEQCRD A Y TYR TYR 50 49 H H 4
SEQCRD A A ALA ALA 51 50 H H 4
SEQCRD A T THR THR 52 51 H H 4
SEQCRD A R ARG ARG 53 52 C C 4
SEQCRD A N ASN ASN 54 53 H C 45
SEQCRD A F PHE PHE 55 54 H H 4
SEQCRD A Q GLN GLN 56 55 H H 4
SEQCRD A L LEU LEU 57 56 H H 4
SEQCRD A A ALA ALA 58 57 H H 4
SEQCRD A E GLU GLU 59 58 H H 4
SEQCRD A A ALA ALA 60 59 H H 4
SEQCRD A Q GLN GLN 61 60 H H 4
SEQCRD A F PHE PHE 62 61 H H 4
SEQCRD A R ARG ARG 63 62 H H 4
SEQCRD A D ASP ASP 64 63 H H 4
SEQCRD A L LEU LEU 65 64 H H 4
SEQCRD A V VAL VAL 66 65 H H 4
SEQCRD A S SER SER 67 66 H H 4
SEQCRD A R ARG ARG 68 67 H H 4
SEQCRD A Y TYR TYR 69 68 H H 4
SEQCRD A P PRO PRO 70 69 C T 45
SEQCRD A T THR THR 71 70 C T 45
SEQCRD A H HIS HIS 72 71 C T 45
SEQCRD A D ASP ASP 73 72 C C 4
SEQCRD A K LYS LYS 74 73 H H 4
SEQCRD A A ALA ALA 75 74 H H 4
SEQCRD A A ALA ALA 76 75 H H 4
SEQCRD A G GLY GLY 77 76 H H 4
SEQCRD A G GLY GLY 78 77 H H 4
SEQCRD A L LEU LEU 79 78 H H 4
SEQCRD A L LEU LEU 80 79 H H 4
SEQCRD A K LYS LYS 81 80 H H 4
SEQCRD A L LEU LEU 82 81 H H 4
SEQCRD A G GLY GLY 83 82 H H 4
SEQCRD A L LEU LEU 84 83 H H 4
SEQCRD A S SER SER 85 84 H H 4
SEQCRD A Q GLN GLN 86 85 H H 4
SEQCRD A Y TYR TYR 87 86 H H 4
SEQCRD A G GLY GLY 88 87 H H 4
SEQCRD A E GLU GLU 89 88 H H 4
SEQCRD A G GLY GLY 90 89 C C 4
SEQCRD A K LYS LYS 91 90 H C 45
SEQCRD A N ASN ASN 92 91 H H 4
SEQCRD A T THR THR 93 92 H H 4
SEQCRD A E GLU GLU 94 93 H H 4
SEQCRD A A ALA ALA 95 94 H H 4
SEQCRD A Q GLN GLN 96 95 H H 4
SEQCRD A Q GLN GLN 97 96 H H 4
SEQCRD A T THR THR 98 97 H H 4
SEQCRD A L LEU LEU 99 98 H H 4
SEQCRD A Q GLN GLN 100 99 H H 4
SEQCRD A Q GLN GLN 101 100 H H 4
SEQCRD A V VAL VAL 102 101 H H 4
SEQCRD A A ALA ALA 103 102 H H 4
SEQCRD A T THR THR 104 103 H H 4
SEQCRD A Q GLN GLN 105 104 H H 4
SEQCRD A Y TYR TYR 106 105 H H 4
SEQCRD A P PRO PRO 107 106 C T 45
SEQCRD A G GLY GLY 108 107 C T 45
SEQCRD A S SER SER 109 108 H T 45
SEQCRD A D ASP ASP 110 109 H H 4
SEQCRD A A ALA ALA 111 110 H H 4
SEQCRD A A ALA ALA 112 111 H H 4
SEQCRD A R ARG ARG 113 112 H H 4
SEQCRD A V VAL VAL 114 113 H H 4
SEQCRD A A ALA ALA 115 114 H H 4
SEQCRD A Q GLN GLN 116 115 H H 4
SEQCRD A E GLU GLU 117 116 H H 4
SEQCRD A R ARG ARG 118 117 H H 4
SEQCRD A L LEU LEU 119 118 H H 4
SEQCRD A Q GLN GLN 120 119 H H 4
SEQCRD A S SER SER 121 120 H H 4
SEQCRD A I ILE ILE 122 121 H H 4
SEQCRD A R ARG ARG 123 122 H C 45
SEQCRD A L LEU --- 124 - - - 367
SEQCRD A G GLY --- 125 - - - 367
SEQCRD A Q GLN --- 126 - - - 367
SEQCRD A Q GLN --- 127 - - - 367
SEQCRD A L LEU --- 128 - - - 367
SEQCRD A R ARG --- 129 - - - 367
SEQCRD B M MET --- 1 - - - 367
SEQCRD B A ALA ALA 2 1 C C 4
SEQCRD B R ARG ARG 3 2 H C 45
SEQCRD B T THR THR 4 3 H H 4
SEQCRD B A ALA ALA 5 4 H H 4
SEQCRD B Y TYR TYR 6 5 H H 4
SEQCRD B N ASN ASN 7 6 H H 4
SEQCRD B V VAL VAL 8 7 H H 4
SEQCRD B A ALA ALA 9 8 H H 4
SEQCRD B F PHE PHE 10 9 H H 4
SEQCRD B D ASP ASP 11 10 H H 4
SEQCRD B A ALA ALA 12 11 H H 4
SEQCRD B L LEU LEU 13 12 H H 4
SEQCRD B K LYS LYS 14 13 H H 4
SEQCRD B N ASN ASN 15 14 H H 4
SEQCRD B G GLY GLY 16 15 C C 4
SEQCRD B K LYS LYS 17 16 H C 45
SEQCRD B Y TYR TYR 18 17 H H 4
SEQCRD B D ASP ASP 19 18 H H 4
SEQCRD B D ASP ASP 20 19 H H 4
SEQCRD B A ALA ALA 21 20 H H 4
SEQCRD B S SER SER 22 21 H H 4
SEQCRD B Q GLN GLN 23 22 H H 4
SEQCRD B L LEU LEU 24 23 H H 4
SEQCRD B F PHE PHE 25 24 H H 4
SEQCRD B L LEU LEU 26 25 H H 4
SEQCRD B S SER SER 27 26 H H 4
SEQCRD B F PHE PHE 28 27 H H 4
SEQCRD B L LEU LEU 29 28 H H 4
SEQCRD B E GLU GLU 30 29 H H 4
SEQCRD B L LEU LEU 31 30 H H 4
SEQCRD B Y TYR TYR 32 31 H T 45
SEQCRD B P PRO PRO 33 32 C T 45
SEQCRD B N ASN ASN 34 33 C T 45
SEQCRD B G GLY GLY 35 34 C T 45
SEQCRD B V VAL VAL 36 35 C C 4
SEQCRD B Y TYR TYR 37 36 H H 4
SEQCRD B T THR THR 38 37 H H 4
SEQCRD B P PRO PRO 39 38 H H 4
SEQCRD B N ASN ASN 40 39 H H 4
SEQCRD B A ALA ALA 41 40 H H 4
SEQCRD B L LEU LEU 42 41 H H 4
SEQCRD B Y TYR TYR 43 42 H H 4
SEQCRD B W TRP TRP 44 43 H H 4
SEQCRD B L LEU LEU 45 44 H H 4
SEQCRD B G GLY GLY 46 45 H H 4
SEQCRD B E GLU GLU 47 46 H H 4
SEQCRD B S SER SER 48 47 H H 4
SEQCRD B Y TYR TYR 49 48 H H 4
SEQCRD B Y TYR TYR 50 49 H H 4
SEQCRD B A ALA ALA 51 50 H H 4
SEQCRD B T THR THR 52 51 H H 4
SEQCRD B R ARG ARG 53 52 C C 4
SEQCRD B N ASN ASN 54 53 H C 45
SEQCRD B F PHE PHE 55 54 H H 4
SEQCRD B Q GLN GLN 56 55 H H 4
SEQCRD B L LEU LEU 57 56 H H 4
SEQCRD B A ALA ALA 58 57 H H 4
SEQCRD B E GLU GLU 59 58 H H 4
SEQCRD B A ALA ALA 60 59 H H 4
SEQCRD B Q GLN GLN 61 60 H H 4
SEQCRD B F PHE PHE 62 61 H H 4
SEQCRD B R ARG ARG 63 62 H H 4
SEQCRD B D ASP ASP 64 63 H H 4
SEQCRD B L LEU LEU 65 64 H H 4
SEQCRD B V VAL VAL 66 65 H H 4
SEQCRD B S SER SER 67 66 H H 4
SEQCRD B R ARG ARG 68 67 H H 4
SEQCRD B Y TYR TYR 69 68 H H 4
SEQCRD B P PRO PRO 70 69 C T 45
SEQCRD B T THR THR 71 70 C T 45
SEQCRD B H HIS HIS 72 71 C T 45
SEQCRD B D ASP ASP 73 72 C C 4
SEQCRD B K LYS LYS 74 73 H H 4
SEQCRD B A ALA ALA 75 74 H H 4
SEQCRD B A ALA ALA 76 75 H H 4
SEQCRD B G GLY GLY 77 76 H H 4
SEQCRD B G GLY GLY 78 77 H H 4
SEQCRD B L LEU LEU 79 78 H H 4
SEQCRD B L LEU LEU 80 79 H H 4
SEQCRD B K LYS LYS 81 80 H H 4
SEQCRD B L LEU LEU 82 81 H H 4
SEQCRD B G GLY GLY 83 82 H H 4
SEQCRD B L LEU LEU 84 83 H H 4
SEQCRD B S SER SER 85 84 H H 4
SEQCRD B Q GLN GLN 86 85 H H 4
SEQCRD B Y TYR TYR 87 86 H H 4
SEQCRD B G GLY GLY 88 87 H H 4
SEQCRD B E GLU GLU 89 88 H H 4
SEQCRD B G GLY GLY 90 89 C C 4
SEQCRD B K LYS LYS 91 90 H C 45
SEQCRD B N ASN ASN 92 91 H H 4
SEQCRD B T THR THR 93 92 H H 4
SEQCRD B E GLU GLU 94 93 H H 4
SEQCRD B A ALA ALA 95 94 H H 4
SEQCRD B Q GLN GLN 96 95 H H 4
SEQCRD B Q GLN GLN 97 96 H H 4
SEQCRD B T THR THR 98 97 H H 4
SEQCRD B L LEU LEU 99 98 H H 4
SEQCRD B Q GLN GLN 100 99 H H 4
SEQCRD B Q GLN GLN 101 100 H H 4
SEQCRD B V VAL VAL 102 101 H H 4
SEQCRD B A ALA ALA 103 102 H H 4
SEQCRD B T THR THR 104 103 H H 4
SEQCRD B Q GLN GLN 105 104 H H 4
SEQCRD B Y TYR TYR 106 105 H H 4
SEQCRD B P PRO PRO 107 106 C T 45
SEQCRD B G GLY GLY 108 107 C T 45
SEQCRD B S SER SER 109 108 H T 45
SEQCRD B D ASP ASP 110 109 H H 4
SEQCRD B A ALA ALA 111 110 H H 4
SEQCRD B A ALA ALA 112 111 H H 4
SEQCRD B R ARG ARG 113 112 H H 4
SEQCRD B V VAL VAL 114 113 H H 4
SEQCRD B A ALA ALA 115 114 H H 4
SEQCRD B Q GLN GLN 116 115 H H 4
SEQCRD B E GLU GLU 117 116 H H 4
SEQCRD B R ARG ARG 118 117 H H 4
SEQCRD B L LEU LEU 119 118 H H 4
SEQCRD B Q GLN GLN 120 119 H H 4
SEQCRD B S SER SER 121 120 H H 4
SEQCRD B I ILE ILE 122 121 H H 4
SEQCRD B R ARG ARG 123 122 H H 4
SEQCRD B L LEU LEU 124 123 H H 4
SEQCRD B G GLY GLY 125 124 C C 4
SEQCRD B Q GLN --- 126 - - - 367
SEQCRD B Q GLN --- 127 - - - 367
SEQCRD B L LEU --- 128 - - - 367
SEQCRD B R ARG --- 129 - - - 367
COMMNT
S2CERR 1 0 No standard amino acid code
S2CERR 2 0 SEQRES and ATOM residue names differ
S2CERR 3 20 No ATOM record
S2CERR 4 367 SEQRES and ATOM residue numbers differ
S2CERR 5 44 PDB and STRIDE secondary structures differ
S2CERR 6 20 PDB secondary structure is absent
S2CERR 7 20 STRIDE secondary structure is absent
COMMNT
COMMNT Crystallographic technical parameters:
PARAME method 'X-RAY DIFFRACTION'
PARAME resolution 1.57
PARAME R-factor 0.20526
PARAME B-factor 18.901
COMMNT
COMMNT Reference database information:
DATABA source:
DATABA UNP: Q8P6F4_XANCP (Q8P6F4)
COMMNT
DATABA mutation:
DATABA MET A 1 --> ? ? 'EXPRESSION TAG'
DATABA ALA C 2 --> ? ? 'EXPRESSION TAG'
DATABA MET C 1 --> ? ? 'EXPRESSION TAG'
DATABA MET B 1 --> ? ? 'EXPRESSION TAG'
DATABA ALA A 2 --> ? ? 'EXPRESSION TAG'
DATABA ALA B 2 --> ? ? 'EXPRESSION TAG'