https://doi.org/10.1351/goldbook.10469
Bone morphogenetic protein member of the transforming growth factor \(\upbeta\!\) (TGF-\(\upbeta\!\)) superfamily.
Note: Amongst the multiple functions of BMP4 is a role in early embryonic differentiation, where it is secreted from the notochord and acts with sonic hedgehog protein to establish a dorsal-ventral axis.
See also: Spemann organizer