| 4BGG: Crystal Structure Of The Acvr1 Kinase In Complex With Ldn-21 reference: Structure-activity relationship of 3,5-diaryl-2-aminopyridine ALK2 inhibitors reveals unaltered binding affinity for fibrodysplasia ossificans progressiva causing mutants., Mohedas AH, Wang Y, Sanvitale CE, Canning P, Choi S, Xing X, Bullock AN, Cuny GD, Yu PB, J Med Chem. 2014 Oct 9;57(19):7900-15. doi: 10.1021/jm501177w. Epub 2014 Sep 4. PMID: 25101911 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).