首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Unphosphorylated calf thymus and aorta myosins contract ghost myofibrils
Authors:P D Wagner
Abstract:The MgATPase activity of unphosphorylated gizzard myosin is not stimulated by actin, but the MgATPase activities of unphosphorylated calf thymus and calf aorta myosins are stimulated by actin. This suggested that unphosphorylated thymus and aorta myosins, but not unphosphorylated gizzard myosin, should be able to cause movement. The contractile activities of these myosins were examined using "ghost" myofibrils, skeletal muscle myofibrils which have been depleted of myosin. Ghost myofibrils were reconstituted with unphosphorylated and phosphorylated turkey gizzard, calf aorta, and calf thymus myosins. While ghost myofibrils reconstituted with unphosphorylated gizzard myosin did not contract, those reconstituted with unphosphorylated thymus and aorta myosins did contract. All three phosphorylated myosins supported contraction.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号