we show the iia to iib transition in the male involves a change in myosin heavy chain synthesis ( figure 39 ) , a corresponding change in the mobility of native myosin isozymes run on pyrophosphate gels ( figure 43 ) , and changes in the proportions of the alpha and beta subunits of tropomyosin ( figure 41 ) .
C0027100
myosin heavy chain
C0027096
myosin