Functional analysis of saxophone, the drosophila gene encoding the BMP type I receptor ortholog of human ALK1/ACVRL1 and ACVR1/ALK2 - Twombly, Vern; Bangi, Erdem; Le, Viet; Malnic, Bettina; Singer, Matthew A; Wharton, Kristi A (Genetics, 2009)