Abstract
CD19 is a B lymphocyte cell surface protein expressed from the earliest stages of B lymphocyte development unitl their terminal differentiation into plasma cells. In this report the human CD19 gene (hCD19) was localized to band p11.2 on the proximal short arm of chromosome 16 by in situ hybridization to metaphase chromosomes, using hCD19 cDNA as probe. hCD19 gene localization was confirmed by polymerase chain reaction based analysis with hCD19-specific primers, using a panel of human/hamster somatic cell hybrid DNA as templates. The mouse CD19 gene (MCd19) was mapped to bands F3-F4 of chromosome 7 by in situ hybridization to metaphase chromosomes, using a mCD19 cDNA probe. Segregation analysis of nucleotide sequence polymorphisms in inter-specific backcross progeny revealed linkage of mCd19 with hemoglobin β (Hbb), Int-2, and H19, other loci previously mapped to the same region of mouse chromosome 7, confirming the localization of mCd19 to this region. The order of these loci was determined to be centromere — Hbb — mCd19 — H19 — Int-2 —telomere. The genetic distance between the loci examined, calculated from the recombination frequencies, suggested that mCd19 was located centrally between Hbb and H19. This region of mouse chromosome 7 is homologous to the region of human chromosome 16 to which the hCD19 gene maps. Multiple genes with a lymphocyte-related function also map to this conserved region including genes encoding the IL-4 receptor, CD11a, CD11b, CD11c, CD43 (leukosialin), and protein kinase C β polypeptide.
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Ord, D.C., Edelhoff, S., Dushkin, H. et al. CD19 maps to a region of conservation between human chromosome 16 and mouse chromosome 7. Immunogenetics 39, 322–328 (1994). https://doi.org/10.1007/BF00189228
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DOI: https://doi.org/10.1007/BF00189228