Nucleotide sequence alignment of sa MSTN-2 promoter alleles (proximal promoter). Details are as in Figure 1. Position +1 has been assigned to the first nucleotide of the translation start codon ATG. The sequence in italics is the consensus sequence for the polymorphic mononucleotide repeat: the first mononucleotide A repeat (from -93 to -101) varies from 8 to 11 bp, and the second A mononucleotide repeat (from -103 to -116) varies from 14 to 23 bp. Sequences highlighted in color are non-identical sequences between a, b, c, and as alleles (yellow, pink, turquoise and green, respectively). In bold letters is the sequence obtained by 5'RACE using brain RNA. TATA and CCAAT boxes are boxed. GenBank Accession numbers of MSTN-2a, -2b, -2as and -2c are GQ379809, GQ379810, GQ379811, and HQ380026, respectively.