Highly expressed in kidney, spleen, adrenal gland, esophagus, duodenum, colon, bladder, ovary, cerebrum and cerebellum and to a lower extent in lung, liver, stomach, uterus and pancreas. Not expressed in heart. Encoded by one of the numerous copies of postmeiotic segregation increased 2-like genes scattered in the q11-q22 region of the chromosome 7. Belongs to the DNA mismatch repair MutL/HexB family. Could be the product of a pseudogene.