1o91 is a 3 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
Kvansakul M, Bogin O, Hohenester E, Yayon A. Crystal structure of the collagen alpha1(VIII) NC1 trimer. Matrix Biol. 2003 Apr;22(2):145-52. PMID:12782141
Shuttleworth CA. Type VIII collagen. Int J Biochem Cell Biol. 1997 Oct;29(10):1145-8. PMID:9438378
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