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71.
Matthew W Blair Sharon JB Knewtson Carolina Astudillo Chee-Ming Li Andrea C Fernandez Michael A Grusak 《BMC plant biology》2010,10(1):215
Background
Iron deficiency anemia is a global problem which often affects women and children of developing countries. Strategy I plants, such as common bean (Phaseolus vulgaris L.) take up iron through a process that involves an iron reduction mechanism in their roots; this reduction is required to convert ferric iron to ferrous iron. Root absorbed iron is critical for the iron nutrition of the plant, and for the delivery of iron to the shoot and ultimately the seeds. The objectives of this study were to determine the variability and inheritance for iron reductase activity in a range of genotypes and in a low × high seed iron cross (DOR364 × G19833), to identify quantitative trait loci (QTL) for this trait, and to assess possible associations with seed iron levels. 相似文献72.
Intraventricular administration of various chain length casomorphins (CM) reliably reduced separation induced distress vocalizations (DVs) in young domestic chicks. At a dose of 50 nanomoles, CM-5 was more potent than either CM-4 or CM-7, but for each the duration of action was approximately half an hour, with CM-7 having a somewhat longer effect. This suppression of DVs was partially antagonized by naloxone (1 mg/kg). 相似文献
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The sequences of the linked alpha 2- and alpha 1-globin genes of the equine
BI and BII haplotypes are greater than 99% identical within a 1.2-kb region
extending from approximately 75 bp upstream of the putative cap site to a
point approximately 150 bp 3' to the poly A addition signal. Differences
between the alpha 2 and alpha 1 genes that are common to both haplotypes
indicate that a major gene conversion occurred approximately 12 Myr ago and
that this has been followed by shorter, more localized, conversions.
Interhaplotype (allelic) comparisons at the alpha loci suggest that the BI
and BII haplotypes have probably existed independently greater than or
equal to 0.5 Myr and that the alpha 1 genes may have undergone a recent
interchromosomal gene conversion.
相似文献
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