Sex hormone binding globulin levels and free progesterone, testosterone and estradiol 17 beta during the annual cycle of the female turtle, Chrysemys picta.
Significant changes in % free serum E2, T and P were observed during the annual cycle of the turtle. In contrast no significant changes in SHBG affinity constants (2.29-4.48 x 10(8) M-7) were found and binding capacity for estradiol 17B was between 3.47 and 3.96 x 10(-7) M except in preovulatory animals (2.00 +/- 0.25).
Albert
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C
Department of Biology, Boston University, MA 02215.
Callard
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IP
D000818:Animals; D004958:Estradiol / Q000097:blood*; D005260:Female; D011374:Progesterone / Q000097:blood*; D012738:Sex Hormone-Binding Globulin / Q000378:metabolism*; D013739:Testosterone / Q000097:blood*; D014426:Turtles
D012738:Sex Hormone-Binding Globulin; D013739:Testosterone; D011374:Progesterone; D004958:Estradiol