This family includes the Smr (Small MutS Related) proteins,and the C-terminal region of the MutS2 protein. It has been suggested that this domain interacts with the MutS1 (<db_xref db="SWISSPROT" dbkey="P23909"/>) protein in the case of Smr proteins and with the N-terminal MutS related region of MutS2, <db_xref db="SWISSPROT" dbkey="P94545"/> [<cite idref="PUB00005494"/>]. Smr protein/MutS2 C-terminal