| 3FJI: reference: Structural basis of conserved cysteine in the fibroblast growth factor family: evidence for a vestigial half-cystine., Lee J, Blaber M, J Mol Biol. 2009 Oct 16;393(1):128-39. Epub 2009 Aug 13. PMID: 19683004 |
This OCA 
Structure page
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(documentation).