Male eye span in stalk-eyed flies indicates genetic quality by meiotic drive suppression
Article Abstract:
Sexual selection in through female preference for male genetic quality is a controversial subject, as genetic mechanisms have insufficient variation in male quality to account for preference and ornament evolution. Research now shows that females have a preference for ornaments indicating genetic quality generated by conflict by sex chromosomes. Sex-ratio distributions were compared in stalk-eyed fly progeny, and female-biased sex ratios occurred in species show eye-stalk sexual dimorphism, and a female preference for long eye span.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Hrs-2 is an ATPase implicated in calcium-regulated secretion
Article Abstract:
A new ATP-preferring nucleotidase that interacts with a component of the protein complexes believed to drive vesicle docking and fusion (SNAP-25) is identified. Binding of the recombinant protein, Hrs-2, to SNAP-25 is restrained by the presence of calcium in the concentration range that facilitates synaptic transmission. The findings suggest that Hrs-2 influences the regulation of secretory processes through calcium- and nucleotide-dependent moderation of vesicle-trafficking protein complexes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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ATP synthase's second stalk comes into focus
Article Abstract:
It has been possible to use cryoelectron microscopy images to indicate details of the link between the F1 and F0 parts of adenosine triphosphate (ATP). Two stalks were found to connect the F1 to the F0 in around 40% of all images obtained. The gamma and epsilon subunits are found in the fatter, more central stalk. The second connector is situated at the side of the molecule. It probably includes both the delta and the b subunits.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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