Release Of ADP From Myosin As soon as the actin and myosin filaments become competent for contraction, the swiveling head of myosin pulls itself along the actin filament. This movement changes the shape of the pocket to which ADP is bound, freeing the ADP molecule. Authored: Gillespie, ME, 2003-07-01 00:00:00 Edited: Gillespie, ME, 2009-03-10 20:55:39 Pubmed2526655 Pubmed3780718 Reactome Database ID Release 43445705 Reactome, http://www.reactome.org ReactomeREACT_20613 Reviewed: Rush, MG, 2008-01-11 00:00:00 has a Stoichiometric coefficient of 2 ADP:Calcium Bound Myosin Actin Complex Calcium Bound Myosin Actin Complex