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281.
The role of hydrophobic force in biological function through the formation of several local macro-molecular structures is evident.
Carbon is the element that contributes to biological function in living systems. We show that carbon distribution is related to
protein activity using an example. The carbon distribution profile is foreseen to help undestand unfolded and misfolded regions of
protein structures. The carbon distribution profile in a toxin protein that is found associated with the toxic shock syndrome is
described in this study. The carbon profile provides insight to the association of specific residues responsible for toxicity. 相似文献
282.
Arumugam Thiagarajan Rajasekaran Lada Steeve Pepin Charles Forney Yves Desjardins Martine Dorais 《Journal of Plant Growth Regulation》2013,32(4):843-851
Seasonal changes in the concentration of abscisic acid (ABA) in current-year needles of two different genotypes (AB-NSD-004 and AB-NSD-184) were monitored in branches collected from 20-year-old balsam fir (Abies balsamea L. (Mill.)) trees over a period of 11 months. A significant genotype × harvesting time interaction was observed for endogenous ABA levels and postharvest needle retention duration (NRD). A consistent pattern of seasonal variation in ABA concentration was observed in both genotypes, with the highest amount of ABA (7,887 ng g?1 DW) accumulating in April and May. The highest levels of ABA coincided with the lowest postharvest NRD regardless of genotype. Nevertheless, genotypes differed in their ABA concentrations. Branches of genotype AB-NSD-184 sampled during August exhibited 170 days of NRD whereas those collected in May and June registered the lowest NRD of around 40 days. There was a significant negative correlation (P < 0.05) between endogenous ABA concentrations and postharvest NRD in genotype AB-NSD-184. Also, an inverse relationship was observed between the average daily photoperiod and the postharvest NRD (R 2 = 0.35; P = 0.000) in the same genotype. Together with average daily temperature, the R 2 value for this correlation reached the highest (0.75; P ≤ 0.00). Genotypes differed in their physiological responses to environmental cues and thus differed in their postharvest qualities. Average daily photoperiod and maximum daily temperature are strongly linked to the postharvest NRD through modulating endogenous ABA concentration. 相似文献