1.M.15.  Putative Phage Spanin 15 (Spanin15) Family 

The founding member of this family is of 135 aas with 1 N-terminal TMS and is from Shewanella baltica (strain OS195).  Homologs are of 130 - 160 aas with 1 N-terminal TMS. Putative members 1.M.15.2.1 and 1.M.15.2.2 are very distantly related to members of subfamily 1.M.15.1.1.