three components of differentiated muscle membrane , the acetylcholine receptor , acetylcholinesterase ( ec 3.1.1.7 ; acetylcholine hydrolase ) , and adenylate cyclase [ ec 4.6.1.1 ; atp pyrophosphate-lyase ( cyclizing ) ] , appear simultaneously during myogenesis in cultures of embryonic chick muscle , after the main period of rapid cell fusion .
C0007589
differentiated
C0007634
the