Nucleotide and deduced amino acid sequence of β2m cDNA isolated from the melanoma cell lines 1074MEL, 1106MEL, 1174MEL, 1180MEL, and 1259MEL. Sequence conservation and nontranslated codons are indicated by dashes and dots, respectively. Point mutations and CT deletions are indicated by bold letters and small upward arrows (^), respectively. Exon-exon junctions are indicated by ▼. Consensus β2m cDNA sequence was obtained from the National Center for Biotechnology Information Gen-Bank (accession BC06491042).