A transporter of Escherichia coli specific for L- and D-methionine is the prototype for a new family within the ABC superfamily.
Zhang Z, Feige JN, Chang AB, Anderson IJ, Brodianski VM, Vitreschak AG, Gelfand MS, Saier MH Jr. Arch Microbiol. 2003 Aug; 180(2):88-100. Epub 2003 Jun 19.