The reciprocal translocation t(2;17) (q21.2; q23.2) was used to map the human genes for myeloperoxidase (MPO), protein kinase C, alpha polypeptide, PRKCA, and the anonymous DNA fragment D17S21 more precisely on human chromosome 17q. MPO and PRKCA remain on the der(17) chromosome and therefore are assigned to 17(q21.3-q23.2) and 17(q22-q23.2), respectively. D17S21 is translocated to chromosome der(2) and by this is assigned to 17(q23.3-q24).