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  • Title: Hormonal regulation of rat androgen-binding protein (ABP) messenger ribonucleic acid and homology of human testosterone-estradiol-binding globulin and ABP complementary deoxyribonucleic acids.
    Author: Reventos J, Hammond GL, Crozat A, Brooks DE, Gunsalus GL, Bardin CW, Musto NA.
    Journal: Mol Endocrinol; 1988 Feb; 2(2):125-32. PubMed ID: 3135485.
    Abstract:
    Complementary DNA clones coding for rat androgen-binding protein (rABP) were isolated from a rat testis cDNA library constructed in the bacteriophage lambda gt11. The library was screened immunochemically, using two different antibodies against rABP. The identity of the isolated clones was confirmed by epitope selection and DNA sequence analysis. The mRNA encoding rABP could be detected in the testes of 20- and 46-day-old-rats, but not in the 10-day-old rats by hybridization with 32P-labeled rABP cDNA in a Northern blot of poly(A)+-RNA fractioned by agarose gel electrophoresis. No hybridization signal was seen with poly(A)+-RNA isolated from kidney and liver. The rABP mRNA appeared as a single species with a size of 1.65 kilobase, sufficient to encode a protein of 42,000 daltons. The concentration of rABP mRNA in the testes of 37-day-old hypophysectomized rats increased after treatment with testosterone and FSH, given alone or in combination. Sequence and hybridization analysis of cDNAs for rABP, human testosterone-estradiol-binding globulin, and human ABP demonstrates that the cDNAs for human testosterone-estradiol binding globulin and human ABP have greater sequence similarity with each other than either has with rABP.
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