BRF1(Butyrate response factor 1) is a member of an immediate early gene family specifying putative nuclear transcription factors. A repeat motif incorporating two Cys and two His is highly conserved between family members identified from yeast,Drosophila,mouse, rat, and human. The chromosome localization of none of the human genes has been determined thus far. Using the polymerase chain reaction on a human–rodent hybrid panel, we have localizedBRF1to chromosome 14. This was confirmed by direct sequencing of the PCR fragment. Using fluorescencein situhybridization, the chromosome localization ofBRF1was further determined as 14q22–q24.