Your request to link to rcsb for ALK1

• 3MTF: crystal structure of the acvr1 kinase in complex with a 2- aminopyridine inhibitor (10.1371/JOURNAL.PONE.0062721 )
• 6EIX: crystal structure of the kinase domain of the q207e mutant of acvr1 (alk2) in complex with a 2-aminopyridine inhibitor k02288