Regional chromosomal localization of the human gene for galactose-1-phosphate uridyltransferase.

In the progeny of somatic cell hybrids formed by fusion of human lymphocytes and Chinese hamster mutant cells, a single human chromosome A2 was selectively retained when grown in appropriate medium. Spontaneous breakage of this chromosome in different hybrid subclones led to the assignment of the gene for galactose-1-phosphate uridyltransferase to the centromeric region of this chromosome (2q11 leads to 2q14). This gene is shown to be syntenic to the previously mapped genes for acid phosphatase 1 and malate dehydrogenase 1.