Nucleotide sequences of the 5′ portions of MTG16a and MTG16b cDNA. The 5′-end sequences that differ between MTG16a and MTG16b cDNA and the deduced amino acid sequences are shown. The shaded area of the sequence indicates the 153 nucleotide region common to both MTG16a andMTG16b cDNA and the underlined sequence indicates the 75 nucleotide region specific to MTG16a. ATG codons are boxed and their upstream stop codons are double-underlined. The entire nucleotide sequence data reported here has been deposited in the DDBJ/EMBL/Genebank database under the accession number AA010419 andAA010420.