Fig. 28
From: Ultra-high resolution X-ray structures of two forms of human recombinant insulin at 100 K
a Electron density in the Intergen (II) structure for PheB24, an example of a clear single highly resolved amino acid residue as in Insugen (I), Fig. 27a. b Electron density in the Intergen (II) structure for PheB25. Unlike PheB25 in Insugen (I), Fig. 27b which has very weak electron density, this is another example of a clear single highly resolved amino acid residue as in Insugen (I) PheB24, Fig. 27a and Intergen (II) Phe24, (a)