- M100856|Col2a-1|Col2a|Rgsc856|Col2|Lpk|Del1 Col2a MGI:88452 genetic mapping Del1 Col2a1 collagen, type II, alpha 1 protein coding gene Gene Lpk M100856 Rgsc856 Col2a-1 Col2 O http://identifiers.org/mgd/MGI:88452