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  • Title: Hemoglobin alterations of the 13-lined ground squirrel while in various activity states.
    Author: Oeltgen PR, Spurrier WA, Bergmann LC.
    Journal: Comp Biochem Physiol B; 1979; 64(2):207-11. PubMed ID: 318302.
    Abstract:
    1. Characterization of fetal, winter-hibernating, winter-active, summer-active and summer-induced hibernating hemoglobins of 13-lined ground squirrels (Citellus tridecemlineatus) by isoelectric focusing (IEF) pH 7.0-9.0 indicated that this molecule is extremely responsive to the various activity states of this hibernator. 2. Major alterations of ground squirrel hemoglobin occur with the varying activity states as evidenced by the distinctive changes in the isoelectric points (pIs) of these protein components. 3. Hemoglobin from winter-hibernating or summer-induced hibernating ground squirrels does not revert to a fetal type of hemoglobin. 4. The presence of an additional hemoglobin peak pI 6.55 in the summer-induced hibernator may serve as a possible assay for hibernation inducing trigger(s) (HIT) molecules under study in our laboratory.
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