Abstract

Appreciable quantities of a compound, now identified as N-acetylglucosamine, have been found in deproteinized, deionized aqueous extracts of the seminal plasma of the red kangaroo (Megaleia rufa), tammar wallaby (Macropus eugenii), grey kangaroo (Macropus giganteus) and the ventral segment of the two segmented prostate gland (Rodger & Hughes, 1973) of the long-nosed bandicoot (Perameles nasuta). Sperm-free seminal plasma was collected by electroejaculation (J. C. Rodger and I. G. White, in preparation) 5 to 15 min after death from tammar wallabies on Kangaroo Island, South Australia, and red and grey kangaroos near Coonamble, N.S.W. The material was handled and extracts made in much the same manner as that described for prostatic tissue collected in the field (Rodger & White, 1974). Weighed portions (approx. 0·5 to 1·0 g) of coagulated seminal plasma were homogenized in distilled

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