Purity ~90% (SDS-PAGE). Type XII collagen interacts with type I collagen-containing fibrils, the COL1 domain could be associated with the surface of the fibrils, and the COL2 and NC3 domains may be localized in the perifibrillar matrix. Source: Recombinant protein corresponding to aa139-311 from chicken COL12A1, fused to His-Tag at N-terminal, expressed in E. coli. Molecular Weight: ~23.3kD AA