2018年4月27日 · Transmembrane proteins basically function as gates or docking sites that allow or prevent the entry or exit of materials across the cell membrane. These are proteins that are situated in the lipid membrane of the cells. Transmembrane proteins carry either endogenous compounds or xenobiotics across biological membranes. The two main forms of …

2018年2月20日 · There are two strategies in transport: active transport and passive transport. Various transmembrane proteins play important role in transport. Transmembrane proteins resides in lipid moiety of the cell membrane because it helps in the movement of solute from outside and inside vice versa. Any charged molecule can not cross the cell membrane so that …

2015年6月27日 · Water passes through the lipid bilayer by diffusion and by osmosis, but most of it moves through special protein channels called aquaporins. > Water can diffuse through the lipid bilayer even though it's polar because it's a very small molecule. Water can also pass through the cell membrane by osmosis, because of the high osmotic pressure difference between the …

2015年10月13日 · There are four levels of protein structure. The short answer is these levels of structure give a protein its overall shape. The job (function) of the protein depends on its shape. The video below discusses the topic of protein structure. Key ideas- 1. The sequence (order) of amino acids in a protein will determine the shape of the protein 2. The job of a protein is …

2018年3月6日 · Monomers - amino acids Polymers - proteins are polymers! A monomer is a single molecule that can be joined together with other same molecules to form a polymer. The building blocks of proteins are amino acids, which contain elements such as H,N,O,C, and more. They are the monomers of the proteins. When hundreds or thousands of amino acids join …

2014年3月18日 · The basic idea here is to use a graph plotting Absorbance vs. Concentration of known solutions. Once you have that you can compare the absorbance value of an unknown sample to figure out its concentration. You will be applying Beer's law to calculate the concentration. The equation for Beer's law is: A = εmCl (A=absorbance, εm = molar extinction …

2017年9月26日 · If you know what proteins are made of, you should know just how many atoms they contain. Proteins are humungous macromolecules, rarely represented by chemical formulas. Proteins are made of amino acid sequences bonded together into secondary structures which interact to form three dimensional tertiary structures which further interact to form quaternary …

2015年9月18日 · Inhibition can reduce the reaction rate of enzymes. Competitive inhibition occurs when a substrate and inhibitor compete for the same binding site. This is generally a reversable inhibition. Non-competitive inhibition inactives the enzyme rather than simply preventing binding.

2018年4月29日 · They consist of long chains of C, H, and O. In terms of chemical composition, lipids differ from nucleic acids and proteins because they mostly just contain carbon, hydrogen, and oxygen (except for phospholipids which of course contain phosphorous). In addition to those elements, proteins contain nitrogen and sulfur, and nucleic acids contain nitrogen and …

2018年1月27日 · Platelet -> a component of blood Fibrin -> a protein Together they participate in forming a hemostatic clot. Fibrinogen and fibrin are not the same thing. Fibrinogen is a protein found in blood plasma. It converts to fibrin, under the influence of thrombin->enzyme, and it is involved in the formation of blood clots. Fibrin that is formed from fibrinogen is a non-globular …