Thioredoxin, a mediator of growth inhibition, maps to 9q31.

The human thioredoxin gene has been provisionally mapped to 3p11-p12. Recently thioredoxin cDNA has been isolated in a procedure that detects transcripts coding for growth-suppressing proteins, and thus the chromosomal location of the gene is of particular interest. Chromosome 3 is believed to harbor several tumor suppressor genes important in the development of lung and other common epithelial tumors. To establish more firmly the chromosomal location of the human thioredoxin gene, a somatic hybrid panel was used; it identified chromosome 9 as the location of the transcribed thioredoxin gene. Fluorescence in situ hybridization of a YAC encoding the transcribed thioredoxin gene refined the localization to 9q31.