Words similar to proteolipid
Example sentences for: proteolipid
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The catalytic subunit exists as two distinct genes with highly conserved exons and intron boundaries in twelve species of plants [ 25 ] . In the flowering plant Daucus carota (carrot) evidence exists for two distinct isoforms for the catalytic subunit, one of which is tonoplast specific while the other is localized to the Golgi [ 26 ] . In addition, two distinct mRNAs have been isolated from cotton ( Gossypium hirsutum ) [ 27 ] . Two subunit A mRNAs are expressed in the unicellular alga Acetabularia acetabulum [ 28 29 ] . Isoforms of other V-ATPase subunits are also known from plants including subunit B [ 27 30 32 ] , the proteolipid subunit [ 33 34 35 36 37 ] and subunits D and E [ 38 ] .
Lycopersicon esculentum ) showed similar results with respect to induction of mRNA for subunit A with an approximately two to four fold increase seen with respect to salt stress [ 60 ] . Recent work in the resurrection plant Tortula ruralis indicated that transcript levels of the proteolipid (subunit c) increased in response to salt stress but that there was no corresponding increase in protein levels [ 61 ] .
Since etiolation results in rapid elongation of seedlings it was expected that there would be a concomitant increase in subunit A messenger RNA as seen with proteolipid subunit mRNA in A. thaliana [ 36 ] and subunit A message levels in rapidly expanding cotton ( Gossypium hirsutum ) fibers [ 73 ] . Equivalent loading of whole RNA was evaluated via spectrophotometry measuring absorption at 260 nm using a Perkin-Elmer Lambda-3 spectrophotometer and by visual confirmation using non denaturing ethidium bromide stained agarose gel electrophoresis (results not shown).
The facultative CAM plant Mesembryanthemum crystallinum displays a differential organ level response to salt stress while still engaged in C 3 photosynthesis [ 53 ] . Subjecting plants to 400 mM NaCl resulted in an approximately two fold increase in the transcript levels of subunits A, B, and the proteolipid in roots prior to the shift to Crassulacean acid metabolism.
None of the previously mentioned efforts into evaluating the role of vacuolar type ATPases in environmental stress acclimation take into account the fact that subunits A, B, and the proteolipid are most certainly present as small gene families in the plants studied.
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