HSkMM from Creative Bioarray are isolated from human muscle of the pectoral girdle. HSkMM are cryopreserved on primary culture or passage one and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HSkMM are characterized by immunofluorescent method with antibodies to myosin, actin and actinin. HSkMM are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi. HSkMM are guaranteed to further expand for 15 population doublings at the conditions provided by Creative Bioarray.