... volumes of 5M urea solution and then run on SDS ⁄ PAGE. Lanes a and d, inthe absence of both TnC and Ca2+; lanes b and e, in the presence of TnC and the absence of Ca2+; lanes c and f, in ... presence (lanes m–q) of equimolar amounts of Akazara scallop TnC. Lanes h and m, ATnI-52K; lanesi and n, ATnI-19K; lanes j and o, ATnI1)128; lanes k and p, ATnI130)252; lanes l and q, ATnI232)292; ... RTnI1)116 and RTnI96)181cosedimented with molar ratios of approximately 0.23, 0.048, and 0.35, respectively, toactin. On the other hand, ATnI-19K, ATnI130)252 and ATnI232)292cosedimented with...