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  • Title: Assignment of the gene for human spasmolytic protein (hSP/SML1) to chromosome 21.
    Author: Theisinger B, Welter C, Grzeschik KH, Blin N.
    Journal: Hum Genet; 1992 Aug; 89(6):681-2. PubMed ID: 1511987.
    Abstract:
    A human cDNA corresponding to the porcine pancreatic spasmolytic protein (PSP) was isolated, and the recombinant clone was originally termed hSP for human spasmolytic protein. Later, the term SML1 for spasmolysin was suggested for the human gene. This protein shows a remarkable sequence homology to pS2, a protein coded by an estrogen-induced gene isolated from the breast carcinoma cell line MCF-7. Although, at the DNA level, the gene sequences pS2 and hSP/SML1 display insufficient homology for cross-hybridization, their expression in tumor cells occurs with remarkable coordination. The human pS2 gene sequence has been assigned to chromosome 21, and we have therefore attempted to map the hSP/SML1 gene by using cDNA and Southern blotting of genomic DNAs from a panel of human-rodent somatic cell hybrids carrying different complements of human chromosomes. Interestingly, the hSP/SML1 gene is also localized on chromosome 21.
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