Figure 3.

(A) Mouse multiple tissue Northern blot. Each lane contains 2 μg of poly(A)⁺ RNA from the tissues indicated hybridized with ³²P-labeled 575 bp Sox6 cDNA fragment (nucleotides 1353–1927). Control hybridization with β-actin was performed to confirm equal loading of RNAs (data not shown). sk, skeletal. (B) Mouse embryonic multiple tissue Northern blot hybridized with the same probe as A. Each lane contains 2 μg of poly(A)⁺ RNA isolated from embryos whose ages are listed above each lane as embryonic day (ED). Numbers on left are sizes of standard marker fragments.