GO:0009986; C:cell surface; IEA:Compara.
GO:0005887; C:integral to plasma membrane; TAS:MGI.
GO:0017002; F:activin-activated receptor activity; IEA:Compara.
GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
GO:0004702; F:receptor signaling protein serine/threonine kinase activity; IEA:Compara.
GO:0005024; F:transforming growth factor beta-activated receptor activity; IEA:InterPro.
GO:0004675; F:transmembrane receptor protein serine/threonine kinase activity; TAS:MGI.
GO:0032924; P:activin receptor signaling pathway; IDA:MGI.
GO:0007417; P:central nervous system development; IEA:Compara.
GO:0046545; P:development of primary female sexual characteristics; IEA:Compara.
GO:0000082; P:G1/S transition of mitotic cell cycle; IEA:Compara.
GO:0001942; P:hair follicle development; IMP:MGI.
GO:0001701; P:in utero embryonic development; IMP:MGI.
GO:0006917; P:induction of apoptosis; IEA:Compara.
GO:0007498; P:mesoderm development; ISA:MGI.
GO:0030308; P:negative regulation of cell growth; IEA:Compara.
GO:0038092; P:nodal signaling pathway; IEA:Compara.
GO:0032927; P:positive regulation of activin receptor signaling pathway; IEA:Compara.
GO:0045648; P:positive regulation of erythrocyte differentiation; IEA:Compara.
GO:0010862; P:positive regulation of pathway-restricted SMAD protein phosphorylation; IEA:Compara.
GO:0045944; P:positive regulation of transcription from RNA polymerase II promoter; IEA:Compara.
GO:1901165; P:positive regulation of trophoblast cell migration; IEA:Compara.
GO:0046777; P:protein autophosphorylation; IEA:Compara.
GO:0009966; P:regulation of signal transduction; IDA:MGI.