sequence of TGF-beta receptor type II Q24468_DROME Act-r Activin-A-receptor-88CD Atr Atr-II Atr88CD AtrII CG7904 IMR:0003017 Punt Punt receptor serine/threonine kinase STK-C TGF-B TGF-beta TGF-beta-type-receptor-like Tgf-r UniProt:Q24468 activin receptor activin receptor type II atrII dlhC dorsal holes C l(3)10460 l(3)j5A5 molecule_role pun punt put