Colmedin (collagen plus olfactomedin) family protein 2 [Caenorhabditis elegans] ref|NP_491804.2| COlmedin (collagen plus olFactomedin) family member (cof-2) [Caenorhabditis elegans] gb|AAR87492.1| collagen/olfactomedin domain containing protein 2 [Caenorhabditis elegans]