>4r9u_D mol:protein length:249 Vitamin B12 import ATP-binding protein BtuD MSIVMQLQDVAESTRLGPLSGEVRAGEILHLVGPNGAGKSTLLARMAGMTSGKGSIQFA GQPLEAWSATKLALHRAYLSQQQTPPFATPVWHYLTLHQHDKTRTELLNDVAGALALDD KLGRSTNQLSGGEWQRVRLAAVVLQITPQANPAGQLLLLDQPMCSLDVAQQSALDKILS ALSQQGLAIVMSSHDLNHTLRHAHRAWLLKGGKMLASGRREEVLTPPNLAQAYGMNFRR LDIEGHRMLISTI