Uteroferrin, a purple-colored, iron-containing acid phosphatase, with many of the properties of a lysosomal hydrolase, transports iron from the mother to the conceptus in pregnant pigs. Uteroferrin, however, is but one member of what may be a broad class of iron-containing phosphatases with unusual spectral properties which result from a novel type of di-iron active site. The biological function of uteroferrin is unknown. We argue here that the in vivo function of uteroferrin, despite its undoubted ability to act as a potent acid phosphatase, is that of a transplacental iron transporter. 相似文献
Phylogenies capture the evolutionary ancestry linking extant species. Correlations and similarities among a set of species
are mediated by and need to be understood in terms of the phylogenic tree. In a similar way it has been argued that biological
networks also induce correlations among sets of interacting genes or their protein products. 相似文献
Three acetotrophicMethanosarcina species, which included marine, nonmarine, and thermophilic strains, were grown on acetate in a 10-liter pH auxostat. Specific growth rates and molar growth yields were constant throughout growth. Cell yields were up to 18-fold greater than previously reported. These properties of the pH auxostat indicate that it is a preferred culture method for the biochemical study of methanogenesis from acetate. 相似文献
The ocelotLeopardus pardalis Linnaeus, 1758 is an endangered felid in the United States currently restricted to southern Texas. The objectives of our
study were to obtain data on ocelot parturition dates, fecundity, sex ratios, den characteristics, and first year survival,
all of which are critical in development of population viability models. Sixteen parturition events were recorded ranging
from mid-April to late December for 12 wild ocelots. Cumulatively, litters consisted of 1 or 2 kittens (ˉ = 1.2 ± 0.44 SD).
Cumulative sex ratio was 1∶2.5 (male:female); however, there was no significant difference between the observed sex ratio
and a 1∶1 sex ratio. Ten den sites were in close proximity (≤ 10 m) to dense thornshrub. Adult female ocelots used 2 to 4
den sites for each litter with distance between consecutively occupied dens ranging from 110 to 280 m (ˉ = 158 m ± 93 SD).
An estimated annual survival for ocelots 0 to 1 year of age was 0.68. Evidence suggests that ocelots in the wild may breed
more frequently than had been previously hypothesized. 相似文献
Hydrobiologia - To observe effects on the phosphorus retention mechanisms of a lake after re-colonisation by macrophytes, Potamogeton crispus L. and Elodea canadensis Michx. were planted in lab... 相似文献
Blossom blight caused by Botrytis cinerea is one among the most devastating diseases that cause complete post-harvest loss in flower crops. The present study focuses on the development of effective bioformulation towards suppression of blossom blight and plant growth promotion in rose. Bacillus amyloliquefaciens (VB2) and Bacillus subtilis (AP) effectively inhibited mycelial growth of B. cinerea in vitro. Genome screening of VB2 and AP revealed the presence of antimicrobial peptide genes including, ituD, ipa14, bacA, bacD, srfA, sfP, spaC, spaS responsible for the biosynthesis of antibiotics such as iturin, bacilysin, bacillomycin, surfactin and subtilin. Further, the presence of volatile antifungal compounds in the bacterial secretome was identified through gas chromatography–mass spectrometry (GC/MS) analysis. Upon treatment, AP accelerated the metabolite profile of the plants and a rise in peak area of antifungal compounds such as, pentadecanoic acid, n-hexadecanoic acid, octadecanoic acid (stearic acid) and tetradecanoic acid was observed. In vitro, VB2 produced maximum indole acetic acid (9.17 µg/ml) and gibberellic acid (8.20 µg/ml) in nutrient broth. Under field conditions, foliar spray of VB2 at 0.5% (5 ml/l), four times at weekly interval suppressed blossom blight incidence (64% reduction over control) and also promoted yield. Future research towards development of an effective bioformulation with extended shelf life will aid in the management of various fungal, bacterial and viral diseases in different crop plants.