extremely important along with a powerful instrument to study the function of megakaryocytes and platelets in diverse physiological and pathological settings, as also shown by other folks (58). We confirmed the absence of FAK protein in platelets of Pf4-Cre+ Fakfl/fl mice. Moreover, Fak mRNA expression was not considerably different in various immune cells isolated in the spleens of WT and Pf4Cre+