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  • S-adenosylmethionine  (1)
  • harem  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Reconstruction of Parentage in a Band of Captive Hamadryas Baboons (1999)
    Springer
    International journal of primatology 20 (1999), S. 415-429 
    Details
    ISSN: 1573-8604
    Keywords: Papio hamadryas hamadryas ; harem ; random mating ; kidnapping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The male leaders of free-ranging harem groups of hamadryas baboons are believed to mate exclusively with the female members of their harems, which typically contain no more than 2–3 females. Using no-parent parentage exclusion analysis (PEA) we identified the paternity of 25 offspring born in a captive band of hamadryas baboons (Papio hamadryas hamadryas) containing five adult males, each with a stable harem of about five females. Nine of 13 microsatellite (SSR) loci known to be highly polymorphic in rhesus macaques (Macaca mulatta) were successful in identifying the sires of all but two offspring without knowledge of the dams' genotypes, and we were able to determine the sires of all offspring when the dams' genotypes were considered. Mating success of the males ranged between 2 and 7 offspring and bore no clear relationship to the males' ages, ranks or the number of females in their harems. The males sired 7 of the 25 offspring with females outside their own harems, with higher-ranking males exhibiting greater success monopolizing access to females in their harem than lower-ranking males did. More surprisingly, the females assigned as the dams of 14 of the 25 offspring could be unequivocally excluded from parentage. The identity of the true dam could be determined for each of these 14 offspring using single-parent PEA and was uncorrelated with the ranks of these offsprings' sires and whether the offspring were born to dams outside the sires' harem groups. The combined effect of this extraharem mating and kidnapping was that only 12 of the 25 offspring were raised within their sires' harem groups. A second group of hamadryas baboons of identical structure exhibited the same high incidences of infant kidnapping and mating outside the harem group. It is unclear whether these behaviors provide an adaptive advantage or represent aberrant behavior resulting from captivity or other circumstances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1020504905350
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  • 2
    Electronic Resource
    Electronic Resource
    Polyamine depletion increases cellular ribonucleotide levels (1986)
    Springer
    Molecular and cellular biochemistry 70 (1986), S. 89-96 
    Details
    ISSN: 1573-4919
    Keywords: α-difluoromethylornithine ; S-adenosylmethionine ; adenine nucleotides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Summary Depletion of the putrescine and spermidine content of Ehrlich ascites tumor cells by α-difluoromethylornithine (DFMO) treatment results in at least a 1500-fold increase in the decarboxylated S-adenosylmethionine (deSAM) content. The accumulation of this adenine nucleoside occurs because of the absence of putrescine and spermidine to act as aminopropyl group acceptors in the spermidine and spermine synthase reactions and because of an increase in S-adenosylmethionine decarboxylase activity. The fact that the synthesis of deSAM continues in DFMO-treated cells makes the pathway an adenine trap. This prompted a study of the adenine nucleotide pools. High-performance liquid chromatographic analysis showed that the total adenine nucleotide pool increased, rather than decreased, as a result of DFMO treatment; the major contributors to the increase being ATP and ADP, which increased 2.6 and 1.9 times, respectively. The cellular content of other ribonucleotides increased as well, particularly that of UTP and CTP. When putrescine was added together with DFMO, the increases in cellular ribonucleotide contents were prevented, showing that they were indeed caused by polyamine depletion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233806
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