cell biology - GPCRs: Gi and Gs - Biology Stack Exchange
2015年4月29日 · Both β1- and β2-adrenergic receptors are coupled to G proteins (Gs), which activate adenylyl cyclase. In contrast, α1 and α2 receptors are coupled to two other G proteins, Gq and Gi, respectively. Gi inhibits adenylyl cyclase, and Gq stimulates phospholipase C to generate IP3 and DAG as second messengers. Also this,
Thermodynamics of spontaneous protein folding: role of enthalpy …
2016年9月5日 · Therefore the free energy of protein folding is negative, and protein folding is a spontaneous process. Citation 2: Rebuttal of role of ΔH of protein and assertion of role of water The following explanation, taken from on-line lecture notes of of Eric V. Minikel of Harvard University, rebutting the point of view above:
How to find the amino acid in the DNA protein
2018年8月6日 · 3' A T A G T A C C G C A T G T A C G G G C G A G A C A T T C G A G C A T T C A T 5' This a Template DNA. How to find the number of amino acids amino acids in the protein encoded by the above gene? The answer is $7$. My Try: First I converted the above DNA to RNA and got. 5' U A U C A U G G C G U A C A U G C C C G C U C U G U A A G C U C G U A A ...
Why does protein have 4 calories per gram? - Biology Stack …
2018年7月30日 · $\begingroup$ @Hal No, what I'm saying is that the "4 kcal/g" figure is for turning protein into energy, not for turning protein into carbohydrate. When you try to turn protein into carbohydrate, there's a number of other considerations to figure in (inefficiency, side products, different behavior of different amino acids).
Why is GTP, rather than ATP, used in nuclear transport?
2017年10月26日 · Rather, it is to produce a conformational change in a protein which allows the termination of a process. This termination is generally through the GDP-bound form of the G protein (grey) interacting with some other protein (black): This diagram is deliberately simplistic so that the general features of G-protein action can be seen.
Advantage of GCPRs over RTKs or other receptor protein kinases
2016年1月30日 · GCPRs do not directly activate a signal transduction pathway. It only does so indirectly, via a G protein. On the other hand, RTKs directly activate a signal transduction pathway, bypassing the mediation of a G protein. (Any G proteins involved with RTKs act as relay molecules in themselves and are part of the signal transduction pathway.)
How does the shape of a protein determine its function?
2021年7月26日 · The spider’s web, the maiden’s flowing locks, the athlete’s muscles all constitute and depend on the properties of fibres which are protein in nature. All share the shape of having an extended chain. Each differs in how the chains are constituted, and with what other proteins it might interact (e.g. to give muscle its contractile properties).
metabolism - Human Body's rate of conversion of carbs, protein …
2022年11月18日 · I also read that protein converts to glucose at a rate of 3 - 12 g protein / hour. 1.3 g protein / 1 g of glucose conversion. Fat converts to glucose over 4 - 6 hours after a meal. Only about 5-6% of the fat triglycerides are converted into glucose. I also read that 2.5 g of fat / 1 g of glucose conversion, which seems to differ then the 5-6% ...
Is ATP Synthase a channel or an enzymatic protein?
2015年12月9日 · G protein coupled receptors. Image source: Wikipedia. Here, a receptor is bound to a G-protein, that becomes activated after receptor binding. The G protein then leaves the receptor and travels to an ion channel and activates it (or inhibits it).
How to make µg/ml concentrations of proteinase-K?
2015年3月25日 · According to Wikipedia, proteinase K is 28.9 kDa or 28900 g/mol. If you are making this conversion, however, make sure you find the actual molecular weight of the protein you're using. 200 µg/mL is equal to: $$\frac{0.2\ g/L}{28900\ g/mol}=6.92\ \mu M$$