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. 2006 Jan 2;172(1):103–113. doi: 10.1083/jcb.200508001

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Figure 7. — Myogenic specification of Pax3 ⁺ cells during muscle regeneration. In resting muscle, Pax3⁺ cells did not coexpress MyoD. In regenerating Pax7 ^lacZ/lacZ and Pax7 ⁺ ^/lacZ muscles 48 h after CTX injection, many Pax3⁺ cells coexpressed MyoD, indicating that these cells had acquired a myogenic fate. Note that in Pax7 ⁺ ^/lacZ, the majority of MyoD⁺ cells did not express Pax3 and are likely expressing Pax7. Bar, 20 μm.