ATP contents were studied in the native and cryoconserved sperm of Siberian white cranes Grus leucogeranus using bioluminescence analysis. The ATP content in freshly obtained spermatozoa was 12.7 nmol/10(8) cells. No ATP was found in the seminal plasma. In the process of freezing-thawing, the ATP concentration in the spermatozoa decreased by 30%. The differences in the dynamics of ATP content during cryoconservation of sperm of white cranes and other birds and mammals are discussed.
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