Fig. 1. Alignment of frog, mouse and human myocardin proteins. The basic region (involved in SRF binding), the SAP domain (involved in chromatin remodeling), and the leucine zipper-like domain (dimerization domain), are labeled. The Xenopus myocardin protein is 56% and 57% identical to the mouse and human proteins, respectively. Accession number for Xenopus laevis myocardin is AY585230.