This allele encodes a glutamine at position 5, a glutamic acid at position 20, a valine at position 26, and an alanine at position 38. This allele is found on SAMP1, SAMP2, SAMP7, SAMP9, SAMP10, A/J, SJL/J, and SM/J backgrounds, also found in NZO, PWK. (J:11543, J:92800)