when grown to high density in a serum-poor medium , these cells differentiated further into typical multinucleated myotubes that expressed the m isoform of creatine kinase and increased levels of surface antigen 5.1h11 , creatine kinase , and nicotinic acetylcholine receptors , but no detectable thy 1 antigen .
C0010291
m
C0010287
creatine kinase