A comparative study of catalytic properties of the sperm-specific lactate dehydrogenase (EC 1.1.1.27) isozyme X or C4 from a variety of animals (boar, bull, goat, Guinea pig, man, mouse, pigeon, rabbit, and rat) is presented. Optimum concentration and Km values for pyruvate, inhibition by substrate,
Strain differences in the immune response of mice to homologous sperm-specific lactate dehydrogenase (LDH-C4)
✍ Scribed by Kille, John W. ;Wheat, Thomas E. ;Mitchell, Graham ;Goldberg, Erwin
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- English
- Weight
- 544 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0022-104X
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✦ Synopsis
Abstract
The sperm‐specific isozyme of murine lactate dehydrogenase (LDH‐C~4~ was injected into female mice of various strains. Two regulatory phenotypes characterize the resultant immunity to LDH‐C~4~: one is manifested by high, intermediate or low levels of response, the other by the immediate or delayed maturation of peak titer. The response of several strains can be classified as high (SWR, SJL, BABL/c, C3H/He) and intermediate to low (A, CBA, DBA/2, DBA/1, C57BL/6) according to the level of antibody production and cell mediated immunity. BALB/c, SJL and SWR strains are immediate responders while and C3H/He mice are clearly delayed responders. Maturation and magnitude of response do not appear to be related. Both the antibody and cell mediated responses are T‐dependent, but are not obviously associated with Ig allotype or H‐2 regulation.
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## Abstract An unusual pattern of LDH isozymes was observed by gel electrophoresis of an extract of a human testis. This isozyme composition is consistent with an allelic variant of Ldh‐c.