l124r - Robuta Search

https://www.ncbi.nlm.nih.gov/Structure/pdb/1RXH 1RXH: Crystal structure of streptavidin mutant L124R (M1) complexed with biotinyl p-nitroanilide... Streptavidin5-(2-OXO-HEXAHYDRO-THIENO[3,4-D]IMIDAZOL-6-YL)-PENTANOIC ACID (4-NITRO-PHENYL)-AMIDE