Retinoid receptors are asymmetrically oriented Retinoic acid receptor (RAR)/ Retinoid X receptor (RXR) heterodimers that bind to specific DNA sequences or Retinoic acid response elements (RAREs) in the promoters of a large number of retinoid-target genes [1], [2], ...

Activins are the members of the Transforming growth factor beta (TGF-beta) superfamily which participate in regulation of several biological processes, including cell differentiation and cell ...