NCIt definition : Platelet-derived growth factor subunit A (211 aa, 24 kDa) is encoded by the human
PDGFA gene. This protein plays a role in the regulation of chemotaxis, cell migration,
cell survival, cell proliferation, and embryonic development.;
NCIt note : Platelet-derived growth factor subunit A can exist as either antiparallel disulfide-linked
homodimers or as heterodimers with platelet-derived growth factor subunit B. A-A,
B-B, and A-B, dimers can bind to PDGF receptors and elicit a variety of cellular responses.;