GAASMIVVYTDREVHGAVGSRVTLHCSFASSEWVSDDISFTWRYQPEGGARAISIFHYAKGQPYIDEVGTFKERIQWVGDPRWKDGSIVIHNLDYSDNGTFTCDVKNPPDIVGKTSQVTLYVFEKVPTR
Ig domain from myelin protein zero, W53A, R74A, D75R mutant.