Female gene flow stratifies Hindu castes
Article Abstract:
The way social processes modulate evolutionary forces have long been of interest to scientists, and the Hindu cast system has been extensively studied. Controversy has surrounded the effect of social stratification on the genetic structure of caste communities. mtDNA and y-chromosome variations in 250 individuals from caste populations from northeastern Andhra Pradesh in India have been analyzed, and 182 unique mtDNA haplotypes were identified. It is shown that differences in social rank corresponds to mtDNA distances, although not genetic distances estimated from y-chromosome data.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Three-dimensional organization of a human water channel
Article Abstract:
The three-dimensional structure of deglycosylated, human erythrocyte aquaporin AQP1 presents a number of interesting features. It has an in-plane, intramolecular 2-fold axis of symmetry located in the hydrophobic core of the bilayer. Six membrane-spanning, tilted alpha-helices make up the AQP1 monomer. It can be established that there is intramolecular symmetry within the AQP1 molecule. This presents a new representation of the topology and design of membrane protein channels.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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