| 1XXA | C:81-153; B:81-152; A:82-152; D:82-152; E:82-152; F:82-152 | C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR/ L-ARGININE COMPLEX; PB DERIVATIVE |
| 1XXB | B:81-152; E:82-152; F:82-152; C:81-152; A:82-152; D:82-152 | C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR/ L-ARGININE COMPLEX |
| 1XXC | A:81-152; B:81-152; C:81-152; D:81-152; E:81-152; F:81-152 | C-TERMINAL DOMAIN OF ESCHERICHIA COLI ARGININE REPRESSOR |