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Homo- and heterodimers are present in the zebrafish embryo. a: anti-HA immunoblot (IB) of anti-HA IPs from lysates of WT, bmp2b MO treated, or bmp7 protein null mutant embryos expressing HA-tagged Bmp7 or Bmp2b. b: anti-HA IP and anti-FLAG IB from embryos co-expressing the indicated ligands. Full blots are shown in Supplementary Information, Figure S6.
