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This is a classical protein purification problem - you have to find ways to fractionate your mixture so that each fraction can be assayed for the activity you are interested in. When you find the active fraction you then subject that to a different type of fractionation. Salting out The solubility of proteins is affected by the ionic strength of the ...


See here. Histones are basic proteins (cationic, high pI) because they are required to interact with polyanionic DNA at physiological pH. Heparin and dextran are polyanions which form insoluble salts with the cationic histones.(Dextran is a polymer of glucose. In dextran sulphate it is derivatised with sulphonate groups creating a polyanionic material.) ...


Telomerases are tightly controlled on all level: Expression, post-translational modifications and by external factors. I think for this the external factors, a protein class called telomeric proteins. They bind to the end of the telomere and regulate the telomerase. The figure is from this paper, which looks into the topic quite extensively: Regulation ...


The following paper answers your question in detail: http://www.ncbi.nlm.nih.gov/pubmed/18568020 It seems like the following aa are responsible for the binding, but please refer to the paper for more details: Val152,Tyr156,Asn157,Ser422,(Asp79)


Take a look at the paper by Ojasoo et al. [1] It reports the relative binding affinity for a wide variety of steroids for the AR, PR and GR. Nandrolone (19-nor testosterone) does not have any affinity for the GR, but is a potent activator of the AR. However, it does have some affinity for the progesterone receptor (does this matter for your research?). ...


A second telomerase is not necessary, as the lagging strand is filled in by the DNA-Polymerase, see this figure:


This is speculation, as I haven't done or read of the required experiment. However, I imagine that this would not be a problem. You're right that the RNA template (TERC) would not hybridize with a poly-G sequence, and so the telomerase would not be able to add more telomere repeats. You can imagine that the poly-G sequence is a cap, preventing telomerase ...

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