Question

The number of known heterodimeric isoforms of platelet-derived growth factor is

One
Two
Three
Four​

Answer 1

There are five different isoforms of PDGF that activate cellular response through two different receptors. Known ligands include: PDGF-AA (PDGFA), -BB (PDGFB), -CC (PDGFC), and -DD (PDGFD), and -AB (a PDGFA and PDGFB heterodimer).

Answer 2

answer is 4

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