We have used two complementary approaches to analyze the chromosomal l
ocation of the gamma-glutamyl carboxylase gene. The amplification of a
carboxylase-specific genomic fragment by polymerase chain reaction (P
CR) in a human-rodent hybrid cell mapping panel localized the gene to
chromosome 2. Mapping by fluorescence in situ hybridization assigned t
he gene to p12 of chromosome 2. Our results indicate that the gamma-gl
utamyl carboxylase gene has a single locus in the human genome. (C) 19
95 Academic Press, Inc.