1: WATERS 402, 404, 508, 509, AND 542 SHARE SOME DISTANCES TOO SHORT FOR INDEPENDENT MOLECULES. THEY MAY REPRESENT AN INCOMPLETELY RESOLVED CITRATE ION. FOR WATERS 403, 442, 502, 510, AND 541, THE ...1: WATERS 402, 404, 508, 509, AND 542 SHARE SOME DISTANCES TOO SHORT FOR INDEPENDENT MOLECULES. THEY MAY REPRESENT AN INCOMPLETELY RESOLVED CITRATE ION. FOR WATERS 403, 442, 502, 510, AND 541, THE SAME APPLIES. THESE PSEUDO-TWO-FOLD RELATED CLUSTERS ARE FOUND NEAR THE N-TERMINI OF THE A-CHAINS.
PSEUDO TWO-FOLD CALCULATED FROM C ALPHA PORTIONS A 6 - A 20 AND B 7 - B 19 AND THE CORRESPONDING ATOMS OF MOLECULE 2. THE TRANSFORMATION PRESENTED ON *MTRIX* RECORDS BELOW WILL YIELD APPROXIMATE COORDINATES FOR CHAINS *C* AND *D* WHEN APPLIED TO CHAINS *A* AND *B*, RESPECTIVELY.
NUMBERING OF THE RESIDUES IS BASED ON INSULIN (EG. 1INS OF PROTEIN DATA BANK). WEAK OR NONEXISTENT ...NUMBERING OF THE RESIDUES IS BASED ON INSULIN (EG. 1INS OF PROTEIN DATA BANK). WEAK OR NONEXISTENT ELECTRON DENSITY PREVENTS IDENTIFICATION OF THE FOLLOWING: SOME ATOMS OF PCA A(-3); RESIDUES SER B 25, THR D 23, TRP D 24 AND SER D 25. MULTIPLE ATOMIC POSITIONS ARE INCLUDED FOR SIDE CHAIN ATOMS OF THE FOLLOWING RESIDUES: SER A 15, GLU B 10, TRP B 24, AND ARG C 14.