Lactate and pyruvate are transported across cell membranes by monocarboxylate transporters (MCTs). Here, we use the recently cloned DNA for hamster MCT1 to isolate cDNA and genomic clones for human MCT1. Comparison of the human and hamster amino acid sequences revealed that the proteins are 86% identical. The gene for human MCT1 (gene symbol, SLC16A1) was localized to human chromosome bands 1p13.2-p12 by PCR analysis of panels of human × rodent cell hybrid lines and by fluorescence chromosomal in situ hybridization.
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