HEADSC 4e7w COMMNT S2C correlation file created: Sat Aug 4 08:48:04 EDT 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 A G GLY --- 1 - - - 367 SEQCRD A S SER --- 2 - - - 367 SEQCRD A F PHE --- 3 - - - 367 SEQCRD A T THR --- 4 - - - 367 SEQCRD A M MET --- 5 - - - 367 SEQCRD A S SER --- 6 - - - 367 SEQCRD A N ASN --- 7 - - - 367 SEQCRD A A ALA --- 8 - - - 367 SEQCRD A P PRO --- 9 - - - 367 SEQCRD A L LEU --- 10 - - - 367 SEQCRD A N ASN --- 11 - - - 367 SEQCRD A G GLY --- 12 - - - 367 SEQCRD A V VAL --- 13 - - - 367 SEQCRD A K LYS --- 14 - - - 367 SEQCRD A L LEU --- 15 - - - 367 SEQCRD A N ASN --- 16 - - - 367 SEQCRD A P PRO --- 17 - - - 367 SEQCRD A L LEU --- 18 - - - 367 SEQCRD A D ASP --- 19 - - - 367 SEQCRD A D ASP ASP 20 16 C C 4 SEQCRD A P PRO PRO 21 17 C C 4 SEQCRD A N ASN ASN 22 18 C C 4 SEQCRD A K LYS LYS 23 19 C C 4 SEQCRD A V VAL VAL 24 20 C E 45 SEQCRD A I ILE ILE 25 21 E E 4 SEQCRD A K LYS LYS 26 22 E E 4 SEQCRD A V VAL VAL 27 23 E E 4 SEQCRD A L LEU LEU 28 24 E E 4 SEQCRD A A ALA ALA 29 25 E E 4 SEQCRD A S SER SER 30 26 E E 4 SEQCRD A D ASP ASP 31 27 E E 4 SEQCRD A G GLY GLY 32 28 C T 45 SEQCRD A K LYS LYS 33 29 C T 45 SEQCRD A T THR THR 34 30 C T 45 SEQCRD A G GLY GLY 35 31 C T 45 SEQCRD A E GLU GLU 36 32 C C 4 SEQCRD A Q GLN GLN 37 33 E E 4 SEQCRD A R ARG ARG 38 34 E E 4 SEQCRD A E GLU GLU 39 35 E E 4 SEQCRD A I ILE ILE 40 36 E E 4 SEQCRD A A ALA ALA 41 37 E E 4 SEQCRD A Y TYR TYR 42 38 E E 4 SEQCRD A T THR THR 43 39 E E 4 SEQCRD A N ASN ASN 44 40 E E 4 SEQCRD A C CYS CYS 45 41 E E 4 SEQCRD A K LYS LYS 46 42 E E 4 SEQCRD A V VAL VAL 47 43 E E 4 SEQCRD A I ILE ILE 48 44 E E 4 SEQCRD A G GLY GLY 49 45 E E 4 SEQCRD A N ASN ASN 50 46 E E 4 SEQCRD A G GLY GLY 51 47 E E 4 SEQCRD A S SER SER 52 48 C T 45 SEQCRD A F PHE PHE 53 49 C T 45 SEQCRD A G GLY GLY 54 50 E E 4 SEQCRD A V VAL VAL 55 51 E E 4 SEQCRD A V VAL VAL 56 52 E E 4 SEQCRD A F PHE PHE 57 53 E E 4 SEQCRD A Q GLN GLN 58 54 E E 4 SEQCRD A A ALA ALA 59 55 E E 4 SEQCRD A K LYS LYS 60 56 E E 4 SEQCRD A L LEU LEU 61 57 E E 4 SEQCRD A V VAL VAL 62 58 C T 45 SEQCRD A E GLU GLU 63 59 C T 45 SEQCRD A S SER SER 64 60 C T 45 SEQCRD A D ASP ASP 65 61 E E 4 SEQCRD A E GLU GLU 66 62 E E 4 SEQCRD A V VAL VAL 67 63 E E 4 SEQCRD A A ALA ALA 68 64 E E 4 SEQCRD A I ILE ILE 69 65 E E 4 SEQCRD A K LYS LYS 70 66 E E 4 SEQCRD A K LYS LYS 71 67 E E 4 SEQCRD A V VAL VAL 72 68 E E 4 SEQCRD A L LEU LEU 73 69 E E 4 SEQCRD A Q GLN GLN 74 70 C C 4 SEQCRD A D ASP ASP 75 71 C T 45 SEQCRD A K LYS LYS 76 72 C T 45 SEQCRD A R ARG ARG 77 73 C T 45 SEQCRD A F PHE PHE 78 74 C T 45 SEQCRD A K LYS LYS 79 75 C C 4 SEQCRD A N ASN ASN 80 76 H C 45 SEQCRD A R ARG ARG 81 77 H H 4 SEQCRD A E GLU GLU 82 78 H H 4 SEQCRD A L LEU LEU 83 79 H H 4 SEQCRD A Q GLN GLN 84 80 H H 4 SEQCRD A I ILE ILE 85 81 H H 4 SEQCRD A M MET MET 86 82 H H 4 SEQCRD A R ARG ARG 87 83 H H 4 SEQCRD A I ILE ILE 88 84 H H 4 SEQCRD A V VAL VAL 89 85 C C 4 SEQCRD A K LYS LYS 90 86 C C 4 SEQCRD A H HIS HIS 91 87 C T 45 SEQCRD A P PRO PRO 92 88 C T 45 SEQCRD A N ASN ASN 93 89 C T 45 SEQCRD A V VAL VAL 94 90 C B 45 SEQCRD A V VAL VAL 95 91 C C 4 SEQCRD A D ASP ASP 96 92 C C 4 SEQCRD A L LEU LEU 97 93 E E 4 SEQCRD A K LYS LYS 98 94 E E 4 SEQCRD A A ALA ALA 99 95 E E 4 SEQCRD A F PHE PHE 100 96 E E 4 SEQCRD A F PHE PHE 101 97 E E 4 SEQCRD A Y TYR TYR 102 98 E E 4 SEQCRD A S SER SER 103 99 E E 4 SEQCRD A N ASN ASN 104 100 E E 4 SEQCRD A G GLY GLY 105 101 C T 45 SEQCRD A D ASP ASP 106 102 C T 45 SEQCRD A K LYS LYS 107 103 C T 45 SEQCRD A K LYS LYS 108 104 C T 45 SEQCRD A D ASP ASP 109 105 C T 45 SEQCRD A E GLU GLU 110 106 C C 4 SEQCRD A V VAL VAL 111 107 E E 4 SEQCRD A F PHE PHE 112 108 E E 4 SEQCRD A L LEU LEU 113 109 E E 4 SEQCRD A N ASN ASN 114 110 E E 4 SEQCRD A L LEU LEU 115 111 E E 4 SEQCRD A V VAL VAL 116 112 E E 4 SEQCRD A L LEU LEU 117 113 E E 4 SEQCRD A E GLU GLU 118 114 E E 4 SEQCRD A Y TYR TYR 119 115 C C 4 SEQCRD A V VAL VAL 120 116 C C 4 SEQCRD A P PRO PRO 121 117 C C 4 SEQCRD A E GLU GLU 122 118 E E 4 SEQCRD A T THR THR 123 119 E E 4 SEQCRD A V VAL VAL 124 120 H H 4 SEQCRD A Y TYR TYR 125 121 H H 4 SEQCRD A R ARG ARG 126 122 H H 4 SEQCRD A A ALA ALA 127 123 H H 4 SEQCRD A S SER SER 128 124 H H 4 SEQCRD A R ARG ARG 129 125 H H 4 SEQCRD A H HIS HIS 130 126 H H 4 SEQCRD A Y TYR TYR 131 127 H H 4 SEQCRD A A ALA ALA 132 128 H H 4 SEQCRD A K LYS LYS 133 129 H H 4 SEQCRD A L LEU LEU 134 130 H H 4 SEQCRD A K LYS LYS 135 131 C C 4 SEQCRD A Q GLN GLN 136 132 C C 4 SEQCRD A T THR THR 137 133 C C 4 SEQCRD A M MET MET 138 134 C C 4 SEQCRD A P PRO PRO 139 135 H C 45 SEQCRD A M MET MET 140 136 H H 4 SEQCRD A L LEU LEU 141 137 H H 4 SEQCRD A L LEU LEU 142 138 H H 4 SEQCRD A I ILE ILE 143 139 H H 4 SEQCRD A K LYS LYS 144 140 H H 4 SEQCRD A L LEU LEU 145 141 H H 4 SEQCRD A Y TYR TYR 146 142 H H 4 SEQCRD A M MET MET 147 143 H H 4 SEQCRD A Y TYR TYR 148 144 H H 4 SEQCRD A Q GLN GLN 149 145 H H 4 SEQCRD A L LEU LEU 150 146 H H 4 SEQCRD A L LEU LEU 151 147 H H 4 SEQCRD A R ARG ARG 152 148 H H 4 SEQCRD A S SER SER 153 149 H H 4 SEQCRD A L LEU LEU 154 150 H H 4 SEQCRD A A ALA ALA 155 151 H H 4 SEQCRD A Y TYR TYR 156 152 H H 4 SEQCRD A I ILE ILE 157 153 H H 4 SEQCRD A H HIS HIS 158 154 H H 4 SEQCRD A S SER SER 159 155 H H 4 SEQCRD A I ILE ILE 160 156 H H 4 SEQCRD A G GLY GLY 161 157 C C 4 SEQCRD A I ILE ILE 162 158 E E 4 SEQCRD A C CYS CYS 163 159 E E 4 SEQCRD A H HIS HIS 164 160 C T 45 SEQCRD A R ARG ARG 165 161 C T 45 SEQCRD A D ASP ASP 166 162 C T 45 SEQCRD A I ILE ILE 167 163 C T 45 SEQCRD A K LYS LYS 168 164 H C 45 SEQCRD A P PRO PRO 169 165 H G 45 SEQCRD A Q GLN GLN 170 166 H G 45 SEQCRD A N ASN ASN 171 167 C G 45 SEQCRD A L LEU LEU 172 168 E E 4 SEQCRD A L LEU LEU 173 169 E E 4 SEQCRD A L LEU LEU 174 170 E E 4 SEQCRD A D ASP ASP 175 171 E E 4 SEQCRD A P PRO PRO 176 172 C T 45 SEQCRD A P PRO PRO 177 173 C T 45 SEQCRD A S SER SER 178 174 C T 45 SEQCRD A G GLY GLY 179 175 C T 45 SEQCRD A V VAL VAL 180 176 E E 4 SEQCRD A L LEU LEU 181 177 E E 4 SEQCRD A K LYS LYS 182 178 E E 4 SEQCRD A L LEU LEU 183 179 E E 4 SEQCRD A I ILE ILE 184 180 C C 4 SEQCRD A D ASP ASP 185 181 C C 4 SEQCRD A F PHE PHE 186 182 C T 45 SEQCRD A G GLY GLY 187 183 C T 45 SEQCRD A S SER SER 188 184 C T 45 SEQCRD A A ALA ALA 189 185 C T 45 SEQCRD A K LYS LYS 190 186 E E 4 SEQCRD A I ILE ILE 191 187 E E 4 SEQCRD A L LEU LEU 192 188 C C 4 SEQCRD A I ILE ILE 193 189 C T 45 SEQCRD A A ALA ALA 194 190 C T 45 SEQCRD A G GLY GLY 195 191 C T 45 SEQCRD A E GLU GLU 196 192 C T 45 SEQCRD A P PRO PRO 197 193 C C 4 SEQCRD A N ASN ASN 198 194 C C 4 SEQCRD A V VAL VAL 199 195 C T 45 SEQCRD A S SER SER 200 196 C T 45 SEQCRD A X PTR PTR 201 197 C T 145 SEQCRD A I ILE ILE 202 198 C T 45 SEQCRD A C CYS CYS 203 199 C C 4 SEQCRD A S SER SER 204 200 H C 45 SEQCRD A R ARG ARG 205 201 H G 45 SEQCRD A Y TYR TYR 206 202 H G 45 SEQCRD A Y TYR TYR 207 203 H G 45 SEQCRD A R ARG ARG 208 204 H C 45 SEQCRD A A ALA ALA 209 205 H C 45 SEQCRD A P PRO PRO 210 206 H H 4 SEQCRD A E GLU GLU 211 207 H H 4 SEQCRD A L LEU LEU 212 208 H H 4 SEQCRD A I ILE ILE 213 209 H H 4 SEQCRD A F PHE PHE 214 210 H H 4 SEQCRD A G GLY GLY 215 211 C C 4 SEQCRD A A ALA ALA 216 212 C T 45 SEQCRD A T THR THR 217 213 C T 45 SEQCRD A N ASN ASN 218 214 C T 45 SEQCRD A Y TYR TYR 219 215 C T 45 SEQCRD A T THR THR 220 216 C C 4 SEQCRD A T THR THR 221 217 H H 4 SEQCRD A N ASN ASN 222 218 H H 4 SEQCRD A I ILE ILE 223 219 H H 4 SEQCRD A D ASP ASP 224 220 H H 4 SEQCRD A I ILE ILE 225 221 H H 4 SEQCRD A W TRP TRP 226 222 H H 4 SEQCRD A S SER SER 227 223 H H 4 SEQCRD A T THR THR 228 224 H H 4 SEQCRD A G GLY GLY 229 225 H H 4 SEQCRD A C CYS CYS 230 226 H H 4 SEQCRD A V VAL VAL 231 227 H H 4 SEQCRD A M MET MET 232 228 H H 4 SEQCRD A A ALA ALA 233 229 H H 4 SEQCRD A E GLU GLU 234 230 H H 4 SEQCRD A L LEU LEU 235 231 H H 4 SEQCRD A M MET MET 236 232 H H 4 SEQCRD A Q GLN GLN 237 233 H H 4 SEQCRD A G GLY GLY 238 234 H C 45 SEQCRD A Q GLN GLN 239 235 C C 4 SEQCRD A P PRO PRO 240 236 C T 45 SEQCRD A L LEU LEU 241 237 C T 45 SEQCRD A F PHE PHE 242 238 C T 45 SEQCRD A P PRO PRO 243 239 C T 45 SEQCRD A G GLY GLY 244 240 C C 4 SEQCRD A E GLU GLU 245 241 C C 4 SEQCRD A S SER SER 246 242 H C 45 SEQCRD A G GLY GLY 247 243 H H 4 SEQCRD A I ILE ILE 248 244 H H 4 SEQCRD A D ASP ASP 249 245 H H 4 SEQCRD A Q GLN GLN 250 246 H H 4 SEQCRD A L LEU LEU 251 247 H H 4 SEQCRD A V VAL VAL 252 248 H H 4 SEQCRD A E GLU GLU 253 249 H H 4 SEQCRD A I ILE ILE 254 250 H H 4 SEQCRD A I ILE ILE 255 251 H H 4 SEQCRD A K LYS LYS 256 252 H H 4 SEQCRD A V VAL VAL 257 253 H H 4 SEQCRD A L LEU LEU 258 254 H H 4 SEQCRD A G GLY GLY 259 255 H C 45 SEQCRD A T THR THR 260 256 C C 4 SEQCRD A P PRO PRO 261 257 C C 4 SEQCRD A S SER SER 262 258 H C 45 SEQCRD A R ARG ARG 263 259 H H 4 SEQCRD A E GLU GLU 264 260 H H 4 SEQCRD A Q GLN GLN 265 261 H H 4 SEQCRD A I ILE ILE 266 262 H H 4 SEQCRD A K LYS LYS 267 263 H H 4 SEQCRD A T THR THR 268 264 H H 4 SEQCRD A M MET MET 269 265 H H 4 SEQCRD A N ASN ASN 270 266 H T 45 SEQCRD A P PRO PRO 271 267 H T 45 SEQCRD A N ASN ASN 272 268 H T 45 SEQCRD A Y TYR TYR 273 269 H T 45 SEQCRD A M MET MET 274 270 H T 45 SEQCRD A E GLU GLU 275 271 C T 45 SEQCRD A H HIS HIS 276 272 C T 45 SEQCRD A K LYS LYS 277 273 C C 4 SEQCRD A F PHE PHE 278 274 C C 4 SEQCRD A P PRO PRO 279 275 C C 4 SEQCRD A Q GLN GLN 280 276 C C 4 SEQCRD A I ILE ILE 281 277 C C 4 SEQCRD A R ARG ARG 282 278 C C 4 SEQCRD A P PRO PRO 283 279 C C 4 SEQCRD A H HIS HIS 284 280 C C 4 SEQCRD A P PRO PRO 285 281 H C 45 SEQCRD A F PHE PHE 286 282 H G 45 SEQCRD A S SER SER 287 283 H G 45 SEQCRD A K LYS LYS 288 284 H G 45 SEQCRD A V VAL VAL 289 285 H C 45 SEQCRD A F PHE PHE 290 286 H C 45 SEQCRD A R ARG ARG 291 287 C T 45 SEQCRD A P PRO PRO 292 288 C T 45 SEQCRD A R ARG ARG 293 289 C T 45 SEQCRD A T THR THR 294 290 C T 45 SEQCRD A P PRO PRO 295 291 H C 45 SEQCRD A P PRO PRO 296 292 H H 4 SEQCRD A D ASP ASP 297 293 H H 4 SEQCRD A A ALA ALA 298 294 H H 4 SEQCRD A I ILE ILE 299 295 H H 4 SEQCRD A D ASP ASP 300 296 H H 4 SEQCRD A L LEU LEU 301 297 H H 4 SEQCRD A I ILE ILE 302 298 H H 4 SEQCRD A S SER SER 303 299 H H 4 SEQCRD A R ARG ARG 304 300 H H 4 SEQCRD A L LEU LEU 305 301 H H 4 SEQCRD A L LEU LEU 306 302 H C 45 SEQCRD A E GLU GLU 307 303 C T 45 SEQCRD A Y TYR TYR 308 304 C T 45 SEQCRD A T THR THR 309 305 H T 45 SEQCRD A P PRO PRO 310 306 H G 45 SEQCRD A S SER SER 311 307 H G 45 SEQCRD A A ALA ALA 312 308 H G 45 SEQCRD A R ARG ARG 313 309 H C 45 SEQCRD A L LEU LEU 314 310 C C 4 SEQCRD A T THR THR 315 311 H C 45 SEQCRD A A ALA ALA 316 312 H H 4 SEQCRD A I ILE ILE 317 313 H H 4 SEQCRD A E GLU GLU 318 314 H H 4 SEQCRD A A ALA ALA 319 315 H H 4 SEQCRD A L LEU LEU 320 316 H H 4 SEQCRD A C CYS CYS 321 317 H H 4 SEQCRD A H HIS HIS 322 318 H C 45 SEQCRD A P PRO PRO 323 319 H G 45 SEQCRD A F PHE PHE 324 320 H G 45 SEQCRD A F PHE PHE 325 321 H G 45 SEQCRD A D ASP ASP 326 322 H T 45 SEQCRD A E GLU GLU 327 323 C T 45 SEQCRD A L LEU LEU 328 324 C T 45 SEQCRD A R ARG ARG 329 325 C T 45 SEQCRD A T THR THR 330 326 C T 45 SEQCRD A G GLY GLY 331 327 C T 45 SEQCRD A E GLU GLU 332 328 C C 4 SEQCRD A A ALA ALA 333 329 C C 4 SEQCRD A R ARG ARG 334 330 C C 4 SEQCRD A M MET MET 335 331 C T 45 SEQCRD A P PRO PRO 336 332 C T 45 SEQCRD A N ASN ASN 337 333 C T 45 SEQCRD A G GLY GLY 338 334 C T 45 SEQCRD A R ARG ARG 339 335 C C 4 SEQCRD A E GLU GLU 340 336 C C 4 SEQCRD A L LEU LEU 341 337 C C 4 SEQCRD A P PRO PRO 342 338 C C 4 SEQCRD A P PRO PRO 343 339 C T 45 SEQCRD A L LEU LEU 344 340 C T 45 SEQCRD A F PHE PHE 345 341 C T 45 SEQCRD A N ASN ASN 346 342 C T 45 SEQCRD A W TRP TRP 347 343 C C 4 SEQCRD A T THR THR 348 344 H C 45 SEQCRD A K LYS LYS 349 345 H H 4 SEQCRD A E GLU GLU 350 346 H H 4 SEQCRD A E GLU GLU 351 347 H H 4 SEQCRD A L LEU LEU 352 348 H H 4 SEQCRD A S SER SER 353 349 H H 4 SEQCRD A V VAL VAL 354 350 H H 4 SEQCRD A R ARG ARG 355 351 H C 45 SEQCRD A P PRO PRO 356 352 H G 45 SEQCRD A D ASP ASP 357 353 H G 45 SEQCRD A L LEU LEU 358 354 H G 45 SEQCRD A I ILE ILE 359 355 H H 4 SEQCRD A S SER SER 360 356 H H 4 SEQCRD A R ARG ARG 361 357 H H 4 SEQCRD A L LEU LEU 362 358 H H 4 SEQCRD A V VAL VAL 363 359 H C 45 SEQCRD A P PRO PRO 364 360 H C 45 SEQCRD A Q GLN GLN 365 361 H G 45 SEQCRD A H HIS HIS 366 362 H G 45 SEQCRD A A ALA ALA 367 363 H G 45 SEQCRD A E GLU GLU 368 364 H T 45 SEQCRD A A ALA ALA 369 365 C T 45 SEQCRD A E GLU GLU 370 366 C T 45 SEQCRD A L LEU LEU 371 367 C C 4 SEQCRD A L LEU LEU 372 368 C T 45 SEQCRD A S SER SER 373 369 C T 45 SEQCRD A R ARG ARG 374 370 C T 45 SEQCRD A G GLY GLY 375 371 C T 45 SEQCRD A I ILE ILE 376 372 C C 4 SEQCRD A D ASP ASP 377 373 C C 4 SEQCRD A V VAL VAL 378 374 C C 4 SEQCRD A H HIS HIS 379 375 C C 4 SEQCRD A N ASN --- 380 - - - 367 SEQCRD A F PHE --- 381 - - - 367 SEQCRD A Q GLN --- 382 - - - 367 SEQCRD A P PRO --- 383 - - - 367 SEQCRD A I ILE --- 384 - - - 367 SEQCRD A P PRO --- 385 - - - 367 SEQCRD A L LEU --- 386 - - - 367 SEQCRD A E GLU --- 387 - - - 367 SEQCRD A S SER --- 388 - - - 367 SEQCRD A L LEU --- 389 - - - 367 SEQCRD A K LYS --- 390 - - - 367 SEQCRD A V VAL --- 391 - - - 367 SEQCRD A T THR --- 392 - - - 367 SEQCRD A L LEU --- 393 - - - 367 SEQCRD A D ASP --- 394 - - - 367 COMMNT S2CERR 1 1 No standard amino acid code S2CERR 2 0 SEQRES and ATOM residue names differ S2CERR 3 34 No ATOM record S2CERR 4 360 SEQRES and ATOM residue numbers differ S2CERR 5 129 PDB and STRIDE secondary structures differ S2CERR 6 34 PDB secondary structure is absent S2CERR 7 34 STRIDE secondary structure is absent COMMNT COMMNT Crystallographic technical parameters: PARAME method 'X-RAY DIFFRACTION' PARAME resolution 3.3000 PARAME R-factor 0.2442 PARAME B-factor 121.6046 COMMNT COMMNT Reference database information: DATABA source: DATABA UNP: Q4PH53_USTMA (Q4PH53) COMMNT DATABA mutation: DATABA THR A 4 --> ? ? 'EXPRESSION TAG' DATABA GLY A 1 --> ? ? 'EXPRESSION TAG' DATABA ? A ? --> LYS 70 DELETION DATABA PHE A 3 --> ? ? 'EXPRESSION TAG' DATABA SER A 2 --> ? ? 'EXPRESSION TAG'