Fig. 2. Nucleotide and amino acid sequences of each allele in the polymorphic repeat region of the hPer3 gene. The 4-repeat and 5-repeat alleles are aligned for optimal homology. The dotted line indicates a gap in the sequence created for optimal alignment. The nucleotide and amino acid that are subject to 3110(T→C) [M1037T] polymorphism, which was exclusively observed on a 4-repeat allele, are boxed. The NcoI restriction site used in RFLP analysis is underlined.