Pie charts show percentages of engrafted human myogenic cells in mdxnude mice as undifferentiated cells and differentiated human myofibers. CORR-R3381X MPCs in Promocell growth medium (15 TA muscles), CORR-K2957fs MPCs in Promocell growth medium (12 TA muscles), and hCD133+ cells in Megacell growth medium (6 TA muscles). In Promocell medium: CORR-R3381X, 15 biological replicates. CORR-K2957fs, 12 biological replicates. In Megacell medium: CORR-R3381X, 6 biological replicates. CORR-K2957fs, 3 biological replicates; hCD133+, 6 biological replicates.