HEADSC 2v6i SEQCRD A K LYS --- 1 - - - 0 SEQCRD A R ARG ARG 2 2 C C 0 SEQCRD A E GLU GLU 3 3 C C 0 SEQCRD A L LEU LEU 4 4 E E 0 SEQCRD A T THR THR 5 5 E E 0 SEQCRD A V VAL VAL 6 6 E E 0 SEQCRD A L LEU LEU 7 7 E E 0 SEQCRD A D ASP ASP 8 8 E E 0 SEQCRD A L LEU LEU 9 9 C C 0 SEQCRD A H HIS HIS 10 10 C C 0 SEQCRD A P PRO PRO 11 11 C C 0 SEQCRD A G GLY GLY 12 12 C C 0 SEQCRD A A ALA ALA 13 13 C C 0 SEQCRD A G GLY GLY 14 14 C C 0 SEQCRD A K LYS LYS 15 15 C C 0 SEQCRD A T THR THR 16 16 C C 0 SEQCRD A R ARG ARG 17 17 C C 0 SEQCRD A R ARG ARG 18 18 H H 0 SEQCRD A V VAL VAL 19 19 H H 0 SEQCRD A L LEU LEU 20 20 H H 0 SEQCRD A P PRO PRO 21 21 H H 0 SEQCRD A Q GLN GLN 22 22 H H 0 SEQCRD A L LEU LEU 23 23 H H 0 SEQCRD A V VAL VAL 24 24 H H 0 SEQCRD A R ARG ARG 25 25 H H 0 SEQCRD A E GLU GLU 26 26 H H 0 SEQCRD A A ALA ALA 27 27 H H 0 SEQCRD A V VAL VAL 28 28 H H 0 SEQCRD A K LYS LYS 29 29 H H 0 SEQCRD A K LYS LYS 30 30 H H 0 SEQCRD A R ARG ARG 31 31 C C 0 SEQCRD A L LEU LEU 32 32 C C 0 SEQCRD A R ARG ARG 33 33 C C 0 SEQCRD A T THR THR 34 34 E E 0 SEQCRD A V VAL VAL 35 35 E E 0 SEQCRD A I ILE ILE 36 36 E E 0 SEQCRD A L LEU LEU 37 37 E E 0 SEQCRD A A ALA ALA 38 38 E E 0 SEQCRD A P PRO PRO 39 39 C C 0 SEQCRD A T THR THR 40 40 H H 0 SEQCRD A R ARG ARG 41 41 H H 0 SEQCRD A V VAL VAL 42 42 H H 0 SEQCRD A V VAL VAL 43 43 H H 0 SEQCRD A A ALA ALA 44 44 H H 0 SEQCRD A S SER SER 45 45 H H 0 SEQCRD A E GLU GLU 46 46 H H 0 SEQCRD A M MET MET 47 47 H H 0 SEQCRD A Y TYR TYR 48 48 H H 0 SEQCRD A E GLU GLU 49 49 H H 0 SEQCRD A A ALA ALA 50 50 H H 0 SEQCRD A L LEU LEU 51 51 H H 0 SEQCRD A R ARG ARG 52 52 C C 0 SEQCRD A G GLY GLY 53 53 C C 0 SEQCRD A E GLU GLU 54 54 C C 0 SEQCRD A P PRO PRO 55 55 C C 0 SEQCRD A I ILE ILE 56 56 E E 0 SEQCRD A R ARG ARG 57 57 E E 0 SEQCRD A Y TYR TYR 58 58 E E 0 SEQCRD A M MET MET 59 59 C C 0 SEQCRD A T THR --- 60 - - - 0 SEQCRD A P PRO --- 61 - - - 0 SEQCRD A A ALA --- 62 - - - 0 SEQCRD A V VAL --- 63 - - - 0 SEQCRD A Q GLN --- 64 - - - 0 SEQCRD A S SER --- 65 - - - 0 SEQCRD A E GLU --- 66 - - - 0 SEQCRD A R ARG --- 67 - - - 0 SEQCRD A T THR --- 68 - - - 0 SEQCRD A G GLY GLY 69 69 C C 0 SEQCRD A N ASN ASN 70 70 C C 0 SEQCRD A E GLU GLU 71 71 C C 0 SEQCRD A I ILE ILE 72 72 C C 0 SEQCRD A V VAL VAL 73 73 E E 0 SEQCRD A D ASP ASP 74 74 E E 0 SEQCRD A F PHE PHE 75 75 E E 0 SEQCRD A M MET MET 76 76 E E 0 SEQCRD A C CYS CYS 77 77 E E 0 SEQCRD A H HIS HIS 78 78 H H 0 SEQCRD A S SER SER 79 79 H H 0 SEQCRD A T THR THR 80 80 H H 0 SEQCRD A F PHE PHE 81 81 H H 0 SEQCRD A T THR THR 82 82 H H 0 SEQCRD A M MET MET 83 83 H H 0 SEQCRD A K LYS LYS 84 84 H H 0 SEQCRD A L LEU LEU 85 85 H H 0 SEQCRD A L LEU LEU 86 86 H H 0 SEQCRD A Q GLN GLN 87 87 H H 0 SEQCRD A G GLY GLY 88 88 H H 0 SEQCRD A V VAL VAL 89 89 C C 0 SEQCRD A R ARG ARG 90 90 C C 0 SEQCRD A V VAL VAL 91 91 C C 0 SEQCRD A P PRO PRO 92 92 C C 0 SEQCRD A N ASN ASN 93 93 C C 0 SEQCRD A Y TYR TYR 94 94 C C 0 SEQCRD A N ASN ASN 95 95 C C 0 SEQCRD A L LEU LEU 96 96 E E 0 SEQCRD A Y TYR TYR 97 97 E E 0 SEQCRD A I ILE ILE 98 98 E E 0 SEQCRD A M MET MET 99 99 E E 0 SEQCRD A D ASP ASP 100 100 E E 0 SEQCRD A E GLU GLU 101 101 C C 0 SEQCRD A A ALA ALA 102 102 C C 0 SEQCRD A H HIS HIS 103 103 C C 0 SEQCRD A F PHE PHE 104 104 C C 0 SEQCRD A L LEU LEU 105 105 C C 0 SEQCRD A D ASP ASP 106 106 H H 0 SEQCRD A P PRO PRO 107 107 H H 0 SEQCRD A A ALA ALA 108 108 H H 0 SEQCRD A S SER SER 109 109 H H 0 SEQCRD A V VAL VAL 110 110 H H 0 SEQCRD A A ALA ALA 111 111 H H 0 SEQCRD A A ALA ALA 112 112 H H 0 SEQCRD A R ARG ARG 113 113 H H 0 SEQCRD A G GLY GLY 114 114 H H 0 SEQCRD A Y TYR TYR 115 115 H H 0 SEQCRD A I ILE ILE 116 116 H H 0 SEQCRD A E GLU GLU 117 117 H H 0 SEQCRD A T THR THR 118 118 H H 0 SEQCRD A R ARG ARG 119 119 H H 0 SEQCRD A V VAL VAL 120 120 H H 0 SEQCRD A S SER SER 121 121 H H 0 SEQCRD A M MET MET 122 122 H H 0 SEQCRD A G GLY GLY 123 123 C C 0 SEQCRD A D ASP ASP 124 124 C C 0 SEQCRD A A ALA ALA 125 125 C C 0 SEQCRD A G GLY GLY 126 126 E E 0 SEQCRD A A ALA ALA 127 127 E E 0 SEQCRD A I ILE ILE 128 128 E E 0 SEQCRD A F PHE PHE 129 129 E E 0 SEQCRD A M MET MET 130 130 E E 0 SEQCRD A T THR THR 131 131 E E 0 SEQCRD A A ALA ALA 132 132 C C 0 SEQCRD A T THR THR 133 133 C C 0 SEQCRD A P PRO PRO 134 134 C C 0 SEQCRD A P PRO PRO 135 135 C C 0 SEQCRD A G GLY GLY 136 136 C C 0 SEQCRD A T THR THR 137 137 C C 0 SEQCRD A T THR THR 138 138 C C 0 SEQCRD A E GLU GLU 139 139 C C 0 SEQCRD A A ALA ALA 140 140 C C 0 SEQCRD A F PHE PHE 141 141 C C 0 SEQCRD A P PRO PRO 142 142 C C 0 SEQCRD A P PRO PRO 143 143 C C 0 SEQCRD A S SER SER 144 144 C C 0 SEQCRD A N ASN ASN 145 145 C C 0 SEQCRD A S SER SER 146 146 C C 0 SEQCRD A P PRO PRO 147 147 C C 0 SEQCRD A I ILE ILE 148 148 C C 0 SEQCRD A I ILE ILE 149 149 E E 0 SEQCRD A D ASP ASP 150 150 E E 0 SEQCRD A E GLU GLU 151 151 E E 0 SEQCRD A E GLU GLU 152 152 E E 0 SEQCRD A T THR THR 153 153 C C 0 SEQCRD A R ARG ARG 154 154 C C 0 SEQCRD A I ILE ILE 155 155 C C 0 SEQCRD A P PRO PRO 156 156 C C 0 SEQCRD A D ASP ASP 157 157 C C 0 SEQCRD A K LYS LYS 158 158 C C 0 SEQCRD A A ALA ALA 159 159 C C 0 SEQCRD A W TRP TRP 160 160 C C 0 SEQCRD A N ASN ASN 161 161 C C 0 SEQCRD A S SER SER 162 162 C C 0 SEQCRD A G GLY GLY 163 163 C C 0 SEQCRD A Y TYR TYR 164 164 H H 0 SEQCRD A E GLU GLU 165 165 H H 0 SEQCRD A W TRP TRP 166 166 H H 0 SEQCRD A I ILE ILE 167 167 H H 0 SEQCRD A T THR THR 168 168 H H 0 SEQCRD A E GLU GLU 169 169 H H 0 SEQCRD A F PHE PHE 170 170 C C 0 SEQCRD A D ASP ASP 171 171 C C 0 SEQCRD A G GLY GLY 172 172 C C 0 SEQCRD A R ARG ARG 173 173 C C 0 SEQCRD A T THR THR 174 174 E E 0 SEQCRD A V VAL VAL 175 175 E E 0 SEQCRD A W TRP TRP 176 176 E E 0 SEQCRD A F PHE PHE 177 177 E E 0 SEQCRD A V VAL VAL 178 178 C C 0 SEQCRD A H HIS HIS 179 179 C C 0 SEQCRD A S SER SER 180 180 H H 0 SEQCRD A I ILE ILE 181 181 H H 0 SEQCRD A K LYS LYS 182 182 H H 0 SEQCRD A Q GLN GLN 183 183 H H 0 SEQCRD A G GLY GLY 184 184 H H 0 SEQCRD A A ALA ALA 185 185 H H 0 SEQCRD A E GLU GLU 186 186 H H 0 SEQCRD A I ILE ILE 187 187 H H 0 SEQCRD A G GLY GLY 188 188 H H 0 SEQCRD A T THR THR 189 189 H H 0 SEQCRD A C CYS CYS 190 190 H H 0 SEQCRD A L LEU LEU 191 191 H H 0 SEQCRD A Q GLN GLN 192 192 H H 0 SEQCRD A K LYS LYS 193 193 H H 0 SEQCRD A A ALA ALA 194 194 H H 0 SEQCRD A G GLY GLY 195 195 C C 0 SEQCRD A K LYS LYS 196 196 C C 0 SEQCRD A K LYS LYS 197 197 C C 0 SEQCRD A V VAL VAL 198 198 E E 0 SEQCRD A L LEU LEU 199 199 E E 0 SEQCRD A Y TYR TYR 200 200 E E 0 SEQCRD A L LEU LEU 201 201 E E 0 SEQCRD A N ASN ASN 202 202 C C 0 SEQCRD A R ARG ARG 203 203 C C 0 SEQCRD A K LYS LYS 204 204 C C 0 SEQCRD A T THR THR 205 205 H H 0 SEQCRD A F PHE PHE 206 206 H H 0 SEQCRD A E GLU GLU 207 207 H H 0 SEQCRD A S SER SER 208 208 H H 0 SEQCRD A E GLU GLU 209 209 H H 0 SEQCRD A Y TYR TYR 210 210 H H 0 SEQCRD A P PRO PRO 211 211 H H 0 SEQCRD A K LYS LYS 212 212 H H 0 SEQCRD A C CYS CYS 213 213 H H 0 SEQCRD A K LYS LYS 214 214 H H 0 SEQCRD A S SER SER 215 215 H H 0 SEQCRD A E GLU GLU 216 216 H H 0 SEQCRD A K LYS LYS 217 217 C C 0 SEQCRD A W TRP TRP 218 218 C C 0 SEQCRD A D ASP ASP 219 219 C C 0 SEQCRD A F PHE PHE 220 220 E E 0 SEQCRD A V VAL VAL 221 221 E E 0 SEQCRD A I ILE ILE 222 222 E E 0 SEQCRD A T THR THR 223 223 E E 0 SEQCRD A T THR THR 224 224 C C 0 SEQCRD A D ASP ASP 225 225 H H 0 SEQCRD A I ILE ILE 226 226 H H 0 SEQCRD A S SER SER 227 227 H H 0 SEQCRD A E GLU GLU 228 228 H H 0 SEQCRD A M MET MET 229 229 H H 0 SEQCRD A G GLY GLY 230 230 C C 0 SEQCRD A A ALA ALA 231 231 C C 0 SEQCRD A N ASN ASN 232 232 C C 0 SEQCRD A F PHE PHE 233 233 C C 0 SEQCRD A K LYS LYS 234 234 C C 0 SEQCRD A A ALA ALA 235 235 C C 0 SEQCRD A D ASP ASP 236 236 C C 0 SEQCRD A R ARG ARG 237 237 E E 0 SEQCRD A V VAL VAL 238 238 E E 0 SEQCRD A I ILE ILE 239 239 E E 0 SEQCRD A D ASP ASP 240 240 E E 0 SEQCRD A P PRO PRO 241 241 C C 0 SEQCRD A R ARG ARG 242 242 C C 0 SEQCRD A K LYS LYS 243 243 E E 0 SEQCRD A T THR THR 244 244 E E 0 SEQCRD A I ILE ILE 245 245 E E 0 SEQCRD A K LYS LYS 246 246 E E 0 SEQCRD A P PRO PRO 247 247 E E 0 SEQCRD A I ILE ILE 248 248 E E 0 SEQCRD A L LEU LEU 249 249 E E 0 SEQCRD A L LEU LEU 250 250 E E 0 SEQCRD A D ASP ASP 251 251 C C 0 SEQCRD A G GLY GLY 252 252 C C 0 SEQCRD A R ARG ARG 253 253 E E 0 SEQCRD A V VAL VAL 254 254 E E 0 SEQCRD A S SER SER 255 255 E E 0 SEQCRD A M MET MET 256 256 E E 0 SEQCRD A Q GLN GLN 257 257 E E 0 SEQCRD A G GLY GLY 258 258 E E 0 SEQCRD A P PRO PRO 259 259 E E 0 SEQCRD A I ILE ILE 260 260 E E 0 SEQCRD A A ALA ALA 261 261 E E 0 SEQCRD A I ILE ILE 262 262 C C 0 SEQCRD A T THR THR 263 263 H H 0 SEQCRD A P PRO PRO 264 264 H H 0 SEQCRD A A ALA ALA 265 265 H H 0 SEQCRD A S SER SER 266 266 H H 0 SEQCRD A A ALA ALA 267 267 H H 0 SEQCRD A A ALA ALA 268 268 H H 0 SEQCRD A Q GLN GLN 269 269 H H 0 SEQCRD A R ARG ARG 270 270 H H 0 SEQCRD A R ARG ARG 271 271 H H 0 SEQCRD A G GLY GLY 272 272 H H 0 SEQCRD A R ARG ARG 273 273 C C 0 SEQCRD A I ILE ILE 274 274 C C 0 SEQCRD A G GLY GLY 275 275 C C 0 SEQCRD A R ARG ARG 276 276 C C 0 SEQCRD A N ASN ASN 277 277 C C 0 SEQCRD A P PRO PRO 278 278 C C 0 SEQCRD A E GLU GLU 279 279 C C 0 SEQCRD A K LYS LYS 280 280 C C 0 SEQCRD A L LEU LEU 281 281 C C 0 SEQCRD A G GLY GLY 282 282 C C 0 SEQCRD A D ASP ASP 283 283 C C 0 SEQCRD A I ILE ILE 284 284 E E 0 SEQCRD A Y TYR TYR 285 285 E E 0 SEQCRD A A ALA ALA 286 286 E E 0 SEQCRD A Y TYR TYR 287 287 E E 0 SEQCRD A S SER SER 288 288 C C 0 SEQCRD A G GLY GLY 289 289 C C 0 SEQCRD A N ASN ASN 290 290 C C 0 SEQCRD A V VAL VAL 291 291 C C 0 SEQCRD A S SER SER 292 292 C C 0 SEQCRD A S SER SER 293 293 C C 0 SEQCRD A D ASP ASP 294 294 C C 0 SEQCRD A N ASN ASN 295 295 C C 0 SEQCRD A E GLU GLU 296 296 C C 0 SEQCRD A G GLY GLY 297 297 C C 0 SEQCRD A H HIS HIS 298 298 H H 0 SEQCRD A V VAL VAL 299 299 H H 0 SEQCRD A S SER SER 300 300 H H 0 SEQCRD A W TRP TRP 301 301 H H 0 SEQCRD A T THR THR 302 302 H H 0 SEQCRD A E GLU GLU 303 303 H H 0 SEQCRD A A ALA ALA 304 304 H H 0 SEQCRD A R ARG ARG 305 305 H H 0 SEQCRD A M MET MET 306 306 H H 0 SEQCRD A L LEU LEU 307 307 H H 0 SEQCRD A L LEU LEU 308 308 H H 0 SEQCRD A D ASP ASP 309 309 H H 0 SEQCRD A N ASN ASN 310 310 C C 0 SEQCRD A V VAL VAL 311 311 C C 0 SEQCRD A H HIS HIS 312 312 C C 0 SEQCRD A V VAL VAL 313 313 C C 0 SEQCRD A Q GLN GLN 314 314 C C 0 SEQCRD A G GLY GLY 315 315 C C 0 SEQCRD A G GLY GLY 316 316 C C 0 SEQCRD A V VAL VAL 317 317 C C 0 SEQCRD A V VAL VAL 318 318 C C 0 SEQCRD A A ALA ALA 319 319 C C 0 SEQCRD A Q GLN GLN 320 320 C C 0 SEQCRD A L LEU LEU 321 321 C C 0 SEQCRD A Y TYR TYR 322 322 H H 0 SEQCRD A T THR THR 323 323 H H 0 SEQCRD A P PRO PRO 324 324 H H 0 SEQCRD A E GLU GLU 325 325 H H 0 SEQCRD A R ARG ARG 326 326 H H 0 SEQCRD A E GLU GLU 327 327 H H 0 SEQCRD A K LYS LYS 328 328 H H 0 SEQCRD A T THR THR 329 329 H H 0 SEQCRD A E GLU GLU 330 330 C C 0 SEQCRD A A ALA ALA 331 331 C C 0 SEQCRD A Y TYR TYR 332 332 C C 0 SEQCRD A E GLU GLU 333 333 C C 0 SEQCRD A G GLY GLY 334 334 C C 0 SEQCRD A E GLU GLU 335 335 C C 0 SEQCRD A F PHE PHE 336 336 C C 0 SEQCRD A K LYS LYS 337 337 C C 0 SEQCRD A L LEU LEU 338 338 C C 0 SEQCRD A K LYS LYS 339 339 H H 0 SEQCRD A T THR THR 340 340 H H 0 SEQCRD A N ASN ASN 341 341 H H 0 SEQCRD A Q GLN GLN 342 342 H H 0 SEQCRD A R ARG ARG 343 343 H H 0 SEQCRD A K LYS LYS 344 344 H H 0 SEQCRD A V VAL VAL 345 345 H H 0 SEQCRD A F PHE PHE 346 346 H H 0 SEQCRD A S SER SER 347 347 H H 0 SEQCRD A E GLU GLU 348 348 H H 0 SEQCRD A L LEU LEU 349 349 H H 0 SEQCRD A I ILE ILE 350 350 H H 0 SEQCRD A R ARG ARG 351 351 H H 0 SEQCRD A T THR THR 352 352 H H 0 SEQCRD A G GLY GLY 353 353 C C 0 SEQCRD A D ASP ASP 354 354 C C 0 SEQCRD A L LEU LEU 355 355 C C 0 SEQCRD A P PRO PRO 356 356 H H 0 SEQCRD A V VAL VAL 357 357 H H 0 SEQCRD A W TRP TRP 358 358 H H 0 SEQCRD A L LEU LEU 359 359 H H 0 SEQCRD A A ALA ALA 360 360 H H 0 SEQCRD A F PHE PHE 361 361 H H 0 SEQCRD A Q GLN GLN 362 362 H H 0 SEQCRD A V VAL VAL 363 363 H H 0 SEQCRD A A ALA ALA 364 364 H H 0 SEQCRD A S SER SER 365 365 H H 0 SEQCRD A A ALA ALA 366 366 H H 0 SEQCRD A N ASN ASN 367 367 C C 0 SEQCRD A V VAL VAL 368 368 C C 0 SEQCRD A E GLU GLU 369 369 C C 0 SEQCRD A Y TYR TYR 370 370 C C 0 SEQCRD A H HIS HIS 371 371 C C 0 SEQCRD A D ASP ASP 372 372 C C 0 SEQCRD A R ARG ARG 373 373 H H 0 SEQCRD A K LYS LYS 374 374 H H 0 SEQCRD A W TRP TRP 375 375 H H 0 SEQCRD A C CYS CYS 376 376 H H 0 SEQCRD A F PHE PHE 377 377 H H 0 SEQCRD A D ASP ASP 378 378 C C 0 SEQCRD A G GLY GLY 379 379 C C 0 SEQCRD A P PRO PRO 380 380 H H 0 SEQCRD A N ASN ASN 381 381 H H 0 SEQCRD A E GLU GLU 382 382 H H 0 SEQCRD A H HIS HIS 383 383 H H 0 SEQCRD A L LEU LEU 384 384 H H 0 SEQCRD A L LEU LEU 385 385 C C 0 SEQCRD A L LEU LEU 386 386 C C 0 SEQCRD A E GLU GLU 387 387 C C 0 SEQCRD A N ASN ASN 388 388 C C 0 SEQCRD A N ASN ASN 389 389 C C 0 SEQCRD A Q GLN GLN 390 390 C C 0 SEQCRD A E GLU GLU 391 391 C C 0 SEQCRD A I ILE ILE 392 392 C C 0 SEQCRD A E GLU GLU 393 393 E E 0 SEQCRD A V VAL VAL 394 394 E E 0 SEQCRD A W TRP TRP 395 395 E E 0 SEQCRD A T THR THR 396 396 C C 0 SEQCRD A R ARG ARG 397 397 C C 0 SEQCRD A Q GLN GLN 398 398 C C 0 SEQCRD A G GLY GLY 399 399 C C 0 SEQCRD A Q GLN GLN 400 400 C C 0 SEQCRD A R ARG ARG 401 401 E E 0 SEQCRD A R ARG ARG 402 402 E E 0 SEQCRD A V VAL VAL 403 403 E E 0 SEQCRD A L LEU LEU 404 404 C C 0 SEQCRD A K LYS LYS 405 405 C C 0 SEQCRD A P PRO PRO 406 406 C C 0 SEQCRD A R ARG ARG 407 407 C C 0 SEQCRD A W TRP TRP 408 408 C C 0 SEQCRD A L LEU LEU 409 409 C C 0 SEQCRD A D ASP ASP 410 410 C C 0 SEQCRD A G GLY GLY 411 411 H H 0 SEQCRD A R ARG ARG 412 412 H H 0 SEQCRD A I ILE ILE 413 413 H H 0 SEQCRD A T THR THR 414 414 H H 0 SEQCRD A S SER SER 415 415 H H 0 SEQCRD A D ASP ASP 416 416 H H 0 SEQCRD A H HIS HIS 417 417 H H 0 SEQCRD A L LEU LEU 418 418 H H 0 SEQCRD A N ASN ASN 419 419 H H 0 SEQCRD A L LEU LEU 420 420 H H 0 SEQCRD A K LYS LYS 421 421 H H 0 SEQCRD A S SER SER 422 422 H H 0 SEQCRD A F PHE PHE 423 423 H H 0 SEQCRD A K LYS LYS 424 424 H H 0 SEQCRD A E GLU GLU 425 425 H H 0 SEQCRD A F PHE PHE 426 426 H H 0 SEQCRD A A ALA ALA 427 427 H H 0 SEQCRD A S SER SER 428 428 H H 0 SEQCRD A G GLY GLY 429 429 C C 0 SEQCRD A K LYS LYS 430 430 C C 0 SEQCRD A R ARG ARG 431 431 C C 0 PARAME method XRAY PARAME resolution 2.10 PARAME R-factor 0.234 PARAME FreeR-factor 0.275