Figure 4From: High-resolution crystal structure of spin labelled (T21R1) azurin from Pseudomonas aeruginosa: a challenging structural benchmark for in silico spin labelling algorithmsThe protein environment forces the R1 side chain into the R1-II/IV conformation. A crystal contact of monomer II is shown in cyan. Side chains are represented as sticks. The alternative R1-I/III conformation of the R1 side-chain and the corresponding conformation of K128 are superposed (magenta).Back to article page