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Identification of exon 33L from rat neonatal hearts. A and B, PCR-based colony screening on rat AH and NH using primers across exons 30–35. M, marker; C, control DNA with exon 33 (33 bp) deletion. Asterisk, colonies with exon 33 deletions. Arrows, colonies with novel exon 33L inclusion. C, summary of the expression of exon 33L in NH (n = 5) and AH (n = 5). *, p = 0.0127, unpaired Student's t test.
