HEADSC 3u0c COMMNT S2C correlation file created: Fri Mar 2 13:09:04 EST 2012 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 B G GLY --- 1 - - - 367 SEQCRD B S SER --- 2 - - - 367 SEQCRD B Q GLN --- 3 - - - 367 SEQCRD B A ALA --- 4 - - - 367 SEQCRD B A ALA --- 5 - - - 367 SEQCRD B N ASN --- 6 - - - 367 SEQCRD B D ASP --- 7 - - - 367 SEQCRD B A ALA --- 8 - - - 367 SEQCRD B A ALA --- 9 - - - 367 SEQCRD B N ASN --- 10 - - - 367 SEQCRD B K LYS --- 11 - - - 367 SEQCRD B L LEU --- 12 - - - 367 SEQCRD B F PHE --- 13 - - - 367 SEQCRD B S SER --- 14 - - - 367 SEQCRD B L LEU --- 15 - - - 367 SEQCRD B T THR --- 16 - - - 367 SEQCRD B I ILE --- 17 - - - 367 SEQCRD B A ALA --- 18 - - - 367 SEQCRD B D ASP --- 19 - - - 367 SEQCRD B L LEU --- 20 - - - 367 SEQCRD B T THR --- 21 - - - 367 SEQCRD B A ALA --- 22 - - - 367 SEQCRD B N ASN --- 23 - - - 367 SEQCRD B Q GLN --- 24 - - - 367 SEQCRD B N ASN --- 25 - - - 367 SEQCRD B I ILE --- 26 - - - 367 SEQCRD B N ASN --- 27 - - - 367 SEQCRD B T THR --- 28 - - - 367 SEQCRD B T THR --- 29 - - - 367 SEQCRD B N ASN --- 30 - - - 367 SEQCRD B A ALA --- 31 - - - 367 SEQCRD B H HIS --- 32 - - - 367 SEQCRD B S SER --- 33 - - - 367 SEQCRD B T THR --- 34 - - - 367 SEQCRD B S SER --- 35 - - - 367 SEQCRD B N ASN --- 36 - - - 367 SEQCRD B I ILE --- 37 - - - 367 SEQCRD B L LEU --- 38 - - - 367 SEQCRD B I ILE --- 39 - - - 367 SEQCRD B P PRO --- 40 - - - 367 SEQCRD B E GLU --- 41 - - - 367 SEQCRD B L LEU --- 42 - - - 367 SEQCRD B K LYS --- 43 - - - 367 SEQCRD B A ALA --- 44 - - - 367 SEQCRD B P PRO --- 45 - - - 367 SEQCRD B K LYS --- 46 - - - 367 SEQCRD B S SER --- 47 - - - 367 SEQCRD B L LEU --- 48 - - - 367 SEQCRD B N ASN ASN 49 74 C C 4 SEQCRD B A ALA ALA 50 75 H H 4 SEQCRD B S SER SER 51 76 H H 4 SEQCRD B S SER SER 52 77 H H 4 SEQCRD B Q GLN GLN 53 78 H H 4 SEQCRD B L LEU LEU 54 79 H H 4 SEQCRD B T THR THR 55 80 H H 4 SEQCRD B L LEU LEU 56 81 H H 4 SEQCRD B L LEU LEU 57 82 H H 4 SEQCRD B I ILE ILE 58 83 H H 4 SEQCRD B G GLY GLY 59 84 H H 4 SEQCRD B N ASN ASN 60 85 H H 4 SEQCRD B L LEU LEU 61 86 H H 4 SEQCRD B I ILE ILE 62 87 H H 4 SEQCRD B Q GLN GLN 63 88 H H 4 SEQCRD B I ILE ILE 64 89 H H 4 SEQCRD B L LEU LEU 65 90 H H 4 SEQCRD B G GLY GLY 66 91 H T 45 SEQCRD B E GLU GLU 67 92 H T 45 SEQCRD B K LYS LYS 68 93 H T 45 SEQCRD B S SER SER 69 94 H T 45 SEQCRD B L LEU LEU 70 95 H H 4 SEQCRD B T THR THR 71 96 H H 4 SEQCRD B A ALA ALA 72 97 H H 4 SEQCRD B L LEU LEU 73 98 H H 4 SEQCRD B T THR THR 74 99 H H 4 SEQCRD B N ASN ASN 75 100 H H 4 SEQCRD B K LYS LYS 76 101 H H 4 SEQCRD B I ILE ILE 77 102 H H 4 SEQCRD B T THR THR 78 103 H H 4 SEQCRD B A ALA ALA 79 104 H H 4 SEQCRD B W TRP TRP 80 105 H H 4 SEQCRD B K LYS LYS 81 106 H H 4 SEQCRD B S SER SER 82 107 H H 4 SEQCRD B Q GLN GLN 83 108 H H 4 SEQCRD B Q GLN GLN 84 109 H H 4 SEQCRD B Q GLN GLN 85 110 H H 4 SEQCRD B A ALA ALA 86 111 H H 4 SEQCRD B R ARG ARG 87 112 H H 4 SEQCRD B Q GLN GLN 88 113 H H 4 SEQCRD B Q GLN GLN 89 114 H H 4 SEQCRD B K LYS LYS 90 115 H H 4 SEQCRD B N ASN ASN 91 116 H H 4 SEQCRD B L LEU LEU 92 117 H H 4 SEQCRD B E GLU GLU 93 118 H H 4 SEQCRD B F PHE PHE 94 119 H H 4 SEQCRD B S SER SER 95 120 H H 4 SEQCRD B D ASP ASP 96 121 H H 4 SEQCRD B K LYS LYS 97 122 H H 4 SEQCRD B I ILE ILE 98 123 H H 4 SEQCRD B N ASN ASN 99 124 H H 4 SEQCRD B T THR THR 100 125 H H 4 SEQCRD B L LEU LEU 101 126 H H 4 SEQCRD B L LEU LEU 102 127 H H 4 SEQCRD B S SER SER 103 128 H H 4 SEQCRD B E GLU GLU 104 129 H H 4 SEQCRD B T THR THR 105 130 H H 4 SEQCRD B E GLU GLU 106 131 H H 4 SEQCRD B G GLY GLY 107 132 H H 4 SEQCRD B L LEU LEU 108 133 H H 4 SEQCRD B T THR THR 109 134 H H 4 SEQCRD B R ARG ARG 110 135 H H 4 SEQCRD B D ASP ASP 111 136 H H 4 SEQCRD B Y TYR TYR 112 137 H H 4 SEQCRD B E GLU GLU 113 138 H H 4 SEQCRD B K LYS LYS 114 139 H H 4 SEQCRD B Q GLN GLN 115 140 H H 4 SEQCRD B I ILE ILE 116 141 H H 4 SEQCRD B N ASN ASN 117 142 H H 4 SEQCRD B K LYS LYS 118 143 H H 4 SEQCRD B L LEU LEU 119 144 H H 4 SEQCRD B K LYS LYS 120 145 H H 4 SEQCRD B N ASN ASN 121 146 H H 4 SEQCRD B A ALA ALA 122 147 H H 4 SEQCRD B D ASP ASP 123 148 H H 4 SEQCRD B S SER SER 124 149 H H 4 SEQCRD B K LYS LYS 125 150 H H 4 SEQCRD B I ILE ILE 126 151 H H 4 SEQCRD B K LYS LYS 127 152 H H 4 SEQCRD B D ASP ASP 128 153 H H 4 SEQCRD B L LEU LEU 129 154 H H 4 SEQCRD B E GLU GLU 130 155 H H 4 SEQCRD B N ASN ASN 131 156 H H 4 SEQCRD B K LYS LYS 132 157 H H 4 SEQCRD B I ILE ILE 133 158 H H 4 SEQCRD B N ASN ASN 134 159 H H 4 SEQCRD B Q GLN GLN 135 160 H H 4 SEQCRD B I ILE ILE 136 161 H H 4 SEQCRD B Q GLN GLN 137 162 H H 4 SEQCRD B T THR THR 138 163 H H 4 SEQCRD B R ARG ARG 139 164 H H 4 SEQCRD B L LEU LEU 140 165 H H 4 SEQCRD B S SER SER 141 166 H H 4 SEQCRD B E GLU GLU 142 167 H H 4 SEQCRD B L LEU LEU 143 168 H C 45 SEQCRD B D ASP ASP 144 169 C T 45 SEQCRD B P PRO PRO 145 170 C T 45 SEQCRD B E GLU GLU 146 171 C T 45 SEQCRD B S SER SER 147 172 C T 45 SEQCRD B P PRO PRO 148 173 C C 4 SEQCRD B E GLU GLU 149 174 H H 4 SEQCRD B K LYS LYS 150 175 H H 4 SEQCRD B K LYS LYS 151 176 H H 4 SEQCRD B K LYS LYS 152 177 H H 4 SEQCRD B L LEU LEU 153 178 H H 4 SEQCRD B S SER SER 154 179 H H 4 SEQCRD B R ARG ARG 155 180 H H 4 SEQCRD B E GLU GLU 156 181 H H 4 SEQCRD B E GLU GLU 157 182 H H 4 SEQCRD B I ILE ILE 158 183 H H 4 SEQCRD B Q GLN GLN 159 184 H H 4 SEQCRD B L LEU LEU 160 185 H H 4 SEQCRD B T THR THR 161 186 H H 4 SEQCRD B I ILE ILE 162 187 H H 4 SEQCRD B K LYS LYS 163 188 H H 4 SEQCRD B K LYS LYS 164 189 H H 4 SEQCRD B D ASP ASP 165 190 H H 4 SEQCRD B A ALA ALA 166 191 H H 4 SEQCRD B A ALA ALA 167 192 H H 4 SEQCRD B V VAL VAL 168 193 H H 4 SEQCRD B K LYS LYS 169 194 H H 4 SEQCRD B D ASP ASP 170 195 H H 4 SEQCRD B R ARG ARG 171 196 H H 4 SEQCRD B T THR THR 172 197 H H 4 SEQCRD B L LEU LEU 173 198 H H 4 SEQCRD B I ILE ILE 174 199 H H 4 SEQCRD B E GLU GLU 175 200 H H 4 SEQCRD B Q GLN GLN 176 201 H H 4 SEQCRD B K LYS LYS 177 202 H H 4 SEQCRD B T THR THR 178 203 H H 4 SEQCRD B L LEU LEU 179 204 H H 4 SEQCRD B S SER SER 180 205 H H 4 SEQCRD B I ILE ILE 181 206 H H 4 SEQCRD B H HIS HIS 182 207 H H 4 SEQCRD B S SER SER 183 208 H H 4 SEQCRD B K LYS LYS 184 209 H H 4 SEQCRD B L LEU LEU 185 210 H H 4 SEQCRD B T THR THR 186 211 H H 4 SEQCRD B D ASP ASP 187 212 H H 4 SEQCRD B K LYS LYS 188 213 H H 4 SEQCRD B S SER SER 189 214 H H 4 SEQCRD B M MET MET 190 215 H H 4 SEQCRD B Q GLN GLN 191 216 H H 4 SEQCRD B L LEU LEU 192 217 H H 4 SEQCRD B E GLU GLU 193 218 H H 4 SEQCRD B K LYS LYS 194 219 H H 4 SEQCRD B E GLU GLU 195 220 H H 4 SEQCRD B I ILE ILE 196 221 H H 4 SEQCRD B D ASP ASP 197 222 H H 4 SEQCRD B S SER SER 198 223 H H 4 SEQCRD B F PHE PHE 199 224 C C 4 SEQCRD B S SER --- 200 - - - 367 SEQCRD B A ALA --- 201 - - - 367 SEQCRD A G GLY --- 1 - - - 367 SEQCRD A S SER --- 2 - - - 367 SEQCRD A Q GLN --- 3 - - - 367 SEQCRD A A ALA --- 4 - - - 367 SEQCRD A A ALA --- 5 - - - 367 SEQCRD A N ASN --- 6 - - - 367 SEQCRD A D ASP --- 7 - - - 367 SEQCRD A A ALA --- 8 - - - 367 SEQCRD A A ALA --- 9 - - - 367 SEQCRD A N ASN --- 10 - - - 367 SEQCRD A K LYS --- 11 - - - 367 SEQCRD A L LEU --- 12 - - - 367 SEQCRD A F PHE --- 13 - - - 367 SEQCRD A S SER --- 14 - - - 367 SEQCRD A L LEU --- 15 - - - 367 SEQCRD A T THR --- 16 - - - 367 SEQCRD A I ILE --- 17 - - - 367 SEQCRD A A ALA --- 18 - - - 367 SEQCRD A D ASP --- 19 - - - 367 SEQCRD A L LEU --- 20 - - - 367 SEQCRD A T THR --- 21 - - - 367 SEQCRD A A ALA --- 22 - - - 367 SEQCRD A N ASN --- 23 - - - 367 SEQCRD A Q GLN --- 24 - - - 367 SEQCRD A N ASN --- 25 - - - 367 SEQCRD A I ILE --- 26 - - - 367 SEQCRD A N ASN --- 27 - - - 367 SEQCRD A T THR --- 28 - - - 367 SEQCRD A T THR --- 29 - - - 367 SEQCRD A N ASN --- 30 - - - 367 SEQCRD A A ALA --- 31 - - - 367 SEQCRD A H HIS --- 32 - - - 367 SEQCRD A S SER --- 33 - - - 367 SEQCRD A T THR --- 34 - - - 367 SEQCRD A S SER --- 35 - - - 367 SEQCRD A N ASN --- 36 - - - 367 SEQCRD A I ILE --- 37 - - - 367 SEQCRD A L LEU --- 38 - - - 367 SEQCRD A I ILE --- 39 - - - 367 SEQCRD A P PRO --- 40 - - - 367 SEQCRD A E GLU --- 41 - - - 367 SEQCRD A L LEU --- 42 - - - 367 SEQCRD A K LYS --- 43 - - - 367 SEQCRD A A ALA --- 44 - - - 367 SEQCRD A P PRO --- 45 - - - 367 SEQCRD A K LYS --- 46 - - - 367 SEQCRD A S SER --- 47 - - - 367 SEQCRD A L LEU --- 48 - - - 367 SEQCRD A N ASN ASN 49 74 H C 45 SEQCRD A A ALA ALA 50 75 H H 4 SEQCRD A S SER SER 51 76 H H 4 SEQCRD A S SER SER 52 77 H H 4 SEQCRD A Q GLN GLN 53 78 H H 4 SEQCRD A L LEU LEU 54 79 H H 4 SEQCRD A T THR THR 55 80 H H 4 SEQCRD A L LEU LEU 56 81 H H 4 SEQCRD A L LEU LEU 57 82 H H 4 SEQCRD A I ILE ILE 58 83 H H 4 SEQCRD A G GLY GLY 59 84 H H 4 SEQCRD A N ASN ASN 60 85 H H 4 SEQCRD A L LEU LEU 61 86 H H 4 SEQCRD A I ILE ILE 62 87 H H 4 SEQCRD A Q GLN GLN 63 88 H H 4 SEQCRD A I ILE ILE 64 89 H H 4 SEQCRD A L LEU LEU 65 90 H H 4 SEQCRD A G GLY GLY 66 91 H T 45 SEQCRD A E GLU GLU 67 92 H T 45 SEQCRD A K LYS LYS 68 93 H T 45 SEQCRD A S SER SER 69 94 H T 45 SEQCRD A L LEU LEU 70 95 H H 4 SEQCRD A T THR THR 71 96 H H 4 SEQCRD A A ALA ALA 72 97 H H 4 SEQCRD A L LEU LEU 73 98 H H 4 SEQCRD A T THR THR 74 99 H H 4 SEQCRD A N ASN ASN 75 100 H H 4 SEQCRD A K LYS LYS 76 101 H H 4 SEQCRD A I ILE ILE 77 102 H H 4 SEQCRD A T THR THR 78 103 H H 4 SEQCRD A A ALA ALA 79 104 H H 4 SEQCRD A W TRP TRP 80 105 H H 4 SEQCRD A K LYS LYS 81 106 H H 4 SEQCRD A S SER SER 82 107 H H 4 SEQCRD A Q GLN GLN 83 108 H H 4 SEQCRD A Q GLN GLN 84 109 H H 4 SEQCRD A Q GLN GLN 85 110 H H 4 SEQCRD A A ALA ALA 86 111 H H 4 SEQCRD A R ARG ARG 87 112 H H 4 SEQCRD A Q GLN GLN 88 113 H H 4 SEQCRD A Q GLN GLN 89 114 H H 4 SEQCRD A K LYS LYS 90 115 H H 4 SEQCRD A N ASN ASN 91 116 H H 4 SEQCRD A L LEU LEU 92 117 H H 4 SEQCRD A E GLU GLU 93 118 H H 4 SEQCRD A F PHE PHE 94 119 H H 4 SEQCRD A S SER SER 95 120 H H 4 SEQCRD A D ASP ASP 96 121 H H 4 SEQCRD A K LYS LYS 97 122 H H 4 SEQCRD A I ILE ILE 98 123 H H 4 SEQCRD A N ASN ASN 99 124 H H 4 SEQCRD A T THR THR 100 125 H H 4 SEQCRD A L LEU LEU 101 126 H H 4 SEQCRD A L LEU LEU 102 127 H H 4 SEQCRD A S SER SER 103 128 H H 4 SEQCRD A E GLU GLU 104 129 H H 4 SEQCRD A T THR THR 105 130 H H 4 SEQCRD A E GLU GLU 106 131 H H 4 SEQCRD A G GLY GLY 107 132 H H 4 SEQCRD A L LEU LEU 108 133 H H 4 SEQCRD A T THR THR 109 134 H H 4 SEQCRD A R ARG ARG 110 135 H H 4 SEQCRD A D ASP ASP 111 136 H H 4 SEQCRD A Y TYR TYR 112 137 H H 4 SEQCRD A E GLU GLU 113 138 H H 4 SEQCRD A K LYS LYS 114 139 H H 4 SEQCRD A Q GLN GLN 115 140 H H 4 SEQCRD A I ILE ILE 116 141 H H 4 SEQCRD A N ASN ASN 117 142 H H 4 SEQCRD A K LYS LYS 118 143 H H 4 SEQCRD A L LEU LEU 119 144 H H 4 SEQCRD A K LYS LYS 120 145 H H 4 SEQCRD A N ASN ASN 121 146 H H 4 SEQCRD A A ALA ALA 122 147 H H 4 SEQCRD A D ASP ASP 123 148 H H 4 SEQCRD A S SER SER 124 149 H H 4 SEQCRD A K LYS LYS 125 150 H H 4 SEQCRD A I ILE ILE 126 151 H H 4 SEQCRD A K LYS LYS 127 152 H H 4 SEQCRD A D ASP ASP 128 153 H H 4 SEQCRD A L LEU LEU 129 154 H H 4 SEQCRD A E GLU GLU 130 155 H H 4 SEQCRD A N ASN ASN 131 156 H H 4 SEQCRD A K LYS LYS 132 157 H H 4 SEQCRD A I ILE ILE 133 158 H H 4 SEQCRD A N ASN ASN 134 159 H H 4 SEQCRD A Q GLN GLN 135 160 H H 4 SEQCRD A I ILE ILE 136 161 H H 4 SEQCRD A Q GLN GLN 137 162 H H 4 SEQCRD A T THR THR 138 163 H H 4 SEQCRD A R ARG ARG 139 164 H H 4 SEQCRD A L LEU LEU 140 165 H H 4 SEQCRD A S SER SER 141 166 H H 4 SEQCRD A E GLU GLU 142 167 H H 4 SEQCRD A L LEU LEU 143 168 C C 4 SEQCRD A D ASP ASP 144 169 C T 45 SEQCRD A P PRO PRO 145 170 C T 45 SEQCRD A E GLU GLU 146 171 C T 45 SEQCRD A S SER SER 147 172 C T 45 SEQCRD A P PRO PRO 148 173 C C 4 SEQCRD A E GLU GLU 149 174 H H 4 SEQCRD A K LYS LYS 150 175 H H 4 SEQCRD A K LYS LYS 151 176 H H 4 SEQCRD A K LYS LYS 152 177 H H 4 SEQCRD A L LEU LEU 153 178 H H 4 SEQCRD A S SER SER 154 179 H H 4 SEQCRD A R ARG ARG 155 180 H H 4 SEQCRD A E GLU GLU 156 181 H H 4 SEQCRD A E GLU GLU 157 182 H H 4 SEQCRD A I ILE ILE 158 183 H H 4 SEQCRD A Q GLN GLN 159 184 H H 4 SEQCRD A L LEU LEU 160 185 H H 4 SEQCRD A T THR THR 161 186 H H 4 SEQCRD A I ILE ILE 162 187 H H 4 SEQCRD A K LYS LYS 163 188 H H 4 SEQCRD A K LYS LYS 164 189 H H 4 SEQCRD A D ASP ASP 165 190 H H 4 SEQCRD A A ALA ALA 166 191 H H 4 SEQCRD A A ALA ALA 167 192 H H 4 SEQCRD A V VAL VAL 168 193 H H 4 SEQCRD A K LYS LYS 169 194 H H 4 SEQCRD A D ASP ASP 170 195 H H 4 SEQCRD A R ARG ARG 171 196 H H 4 SEQCRD A T THR THR 172 197 H H 4 SEQCRD A L LEU LEU 173 198 H H 4 SEQCRD A I ILE ILE 174 199 H H 4 SEQCRD A E GLU GLU 175 200 H H 4 SEQCRD A Q GLN GLN 176 201 H H 4 SEQCRD A K LYS LYS 177 202 H H 4 SEQCRD A T THR THR 178 203 H H 4 SEQCRD A L LEU LEU 179 204 H H 4 SEQCRD A S SER SER 180 205 H H 4 SEQCRD A I ILE ILE 181 206 H H 4 SEQCRD A H HIS HIS 182 207 H H 4 SEQCRD A S SER SER 183 208 H H 4 SEQCRD A K LYS LYS 184 209 H H 4 SEQCRD A L LEU LEU 185 210 H H 4 SEQCRD A T THR THR 186 211 H H 4 SEQCRD A D ASP ASP 187 212 H H 4 SEQCRD A K LYS LYS 188 213 H H 4 SEQCRD A S SER SER 189 214 H H 4 SEQCRD A M MET MET 190 215 H H 4 SEQCRD A Q GLN GLN 191 216 H H 4 SEQCRD A L LEU LEU 192 217 H H 4 SEQCRD A E GLU GLU 193 218 H H 4 SEQCRD A K LYS LYS 194 219 H H 4 SEQCRD A E GLU GLU 195 220 H H 4 SEQCRD A I ILE ILE 196 221 H H 4 SEQCRD A D ASP ASP 197 222 H H 4 SEQCRD A S SER SER 198 223 H H 4 SEQCRD A F PHE PHE 199 224 C C 4 SEQCRD A S SER --- 200 - - - 367 SEQCRD A A ALA --- 201 - - - 367 COMMNT S2CERR 1 0 No standard amino acid code S2CERR 2 0 SEQRES and ATOM residue names differ S2CERR 3 100 No ATOM record S2CERR 4 302 SEQRES and ATOM residue numbers differ S2CERR 5 18 PDB and STRIDE secondary structures differ S2CERR 6 100 PDB secondary structure is absent S2CERR 7 100 STRIDE secondary structure is absent COMMNT COMMNT Crystallographic technical parameters: PARAME method 'X-RAY DIFFRACTION' PARAME resolution 2.050 PARAME R-factor 0.2478 PARAME B-factor ? COMMNT COMMNT Reference database information: DATABA source: DATABA UNP: IPAB_SHIFL (P18011) COMMNT DATABA mutation: DATABA GLY A 1 --> ? ? 'EXPRESSION TAG' DATABA SER B 2 --> ? ? 'EXPRESSION TAG' DATABA SER A 2 --> ? ? 'EXPRESSION TAG' DATABA GLY B 1 --> ? ? 'EXPRESSION TAG'