Summary
PP14 protein (placental protein 14) is abundantly secreted by the human endometrium under the influence of progesterone. Human PP14 is homologous to β-lactoglobulin, the main component of equine, bovine, and ovine milk whey. A genomic PP14 probe (PP14G1) was used for the chromosome assignment of the PP14 gene. Somatic hybrid cells enabled PP14G1 to be assigned to chromosome 9. In situ hybridization further refined this assignment to 9q34. The localization of the PP14 gene in the region of the ABO locus is consistent with the linkage described in bovines between beta-lactoglobulin and the J blood group (homologous to the human ABO group).
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Van Cong, N., Vaisse, C., Gross, MS. et al. The human placental protein 14 (PP14) gene is localized on chromosome 9q34. Hum Genet 86, 515–518 (1991). https://doi.org/10.1007/BF00194645
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DOI: https://doi.org/10.1007/BF00194645