How do transposons differ from retrotransposons? What is test validity? How does a cryptic pregnancy work? How are melanocytes activated? How is lawrencium used? What is TSNO meteorology? How are phytochemicals important? How is californium-252 made?
The source of the enzyme activity responsible for the transposition of retrotransposons of the type that lack terminal repeats has at last been identified: in L1Hs elements, it is encoded by the second open reading frame and is a nuclease related to the apurinic repair endonucleases.Previous...
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挖掘机技术性能好、工作装置品种范围大。例如1立方毫米(mm³)斗容量的液压挖掘机的斗齿挖掘力，可达数百万牛。Excavators are credited for their superior technical properties and a full range of working tools. For instance, the digging force of a hydraulic ...
This class of elements is distinguished from that of the non-LTR retrotransposons, which consists of two main subclasses: the long interspersed nuclear elements (LINEs), which have coding capacities, and the short interspersed nuclear elements (SINEs), which do not (Figure 1). The class-II TEs...
On the whole, people aren't as empathetic as they'd like to think they are or as their peers would like to think they are. In the social work profession, we strive to uphold a code of ethics and believe our peers will do the same, but in practice, it's not always easy. ...
The largest and the smallest: dinosaurs reached an amazing range in size through the Mesozoic Era. Credit: Vitor Silva How do you weigh a long-extinct dinosaur? There are a couple of ways, as it turns out, neither of which involve actual weighing—but according to a new study, different ...
To complicate matters further, another group showed that retrotransposition of long interspersed nuclear elements-1 (LINE-1 or L1s), which are abundant retrotransposons that comprise approximately 20% of mammalian genomes, during brain development can have an impact on gene expression and neuronal ...
How does it work? Let's continue the example of walking routes through a park. If you know the identities of those included in the study, but you don't know who took which route then you might assume that privacy is protected. But that may not be the case. ...
Klenov MS, Lavrov SA, Stolyarenko AD, Ryazansky SS, Aravin AA, Tuschl T, Gvozdev VA: Repeat-associated siRNAs cause chromatin silencing of retrotransposons in the Drosophila melanogaster germline. Nucleic Acids Res. 2007, 35: 5430-5438. 10.1093/nar/gkm576. Article PubMed CAS PubMed Central ...