ID1 and Miyoshi myopathy: Knock-down of Id1dramatically decreased the proliferation of KMM cells (Fig. 6B) and inhibited the formation of foci in culture (Fig. 6C, D), formation of colonies in soft agar (Fig. 6E, F), and induction of tumors in nude mice (Fig. 6G, H, I) In contrast, knockdown of Id1 in MM cells only slightly decreased the proliferation of MM cells (Fig. S7).