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Fig. 6. ryr1b and ryr1a are expressed by fast and slow muscle,
respectively. (A) Reverse transcriptase (RT)-PCR shows that both
ryr1b and ryr1a are expressed at 1, 2 and 3 dpf, and in
adults. RT-PCR with mRNA from deep muscles indicates that ryr1b but
not ryr1a is expressed by adult fast muscles. (B-I) In situ
hybridization with ryr1b (B-E) and ryr1a (F-I) probes.
Wholemounts show that both genes are expressed by muscle at 24 (B,F) and 48
(D,H) hpf. Cross-sections show that ryr1b is expressed by deep, fast
muscles (C,E), whereas ryr1a is expressed by superficial, slow
muscles but not by fast muscles (G,I).