Raffinose (see prev. question for structure) is not digestible by humans yet is found in foods we eat all the time like beans, cabbage, brussels sprouts etc. What 2 human digestible compounds can Raffinose be broken down into?
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- 1.Ala-Phe-Lys-Val-Val-Glu From the above polypeptide, what amino acid/s go/goes inside the cell after the following treatment: Chemotrypsin, thermolysin, then finally pepsin. What protein is left undigested? Write the primary structure of the undigested protein? 2.K-V-F-W-P-L-A-Y a.Chemotrypsin treatment b.Trypsin treatment c.Pepsin treatment d.Thermolysin treatment 3.Total acid hydrolysis of a pentapeptide complemented by total alkalinehydrolysis yields an equimolar mixture of 5 amino acids listed alphabetically, ala-cys,lys,phe,ser. N-terminal analysis with phenylisothiocyanate (PITC) generate PTH-ser. Trypsin digestion produces a tripeptide where N-terminal residue is cys and a dipeptide with ser as its N- terminal.Chemotrypsin digestion of the above tripeptide yields ala plus another dipeptide. A.What is the amino acid sequence of the tripeptide B.What is the amino acid sequence of the dipeptide derived from trypsin digestion? C.What is the primary structure of the original…what are the formal chemical names for sucrose,lactose and maltose? ex. celllubiose is B-D-Glucopyranosyl1-(1->4)-B-D-glucopyranose. how do you get the answer?Draw the Fischer Projection, Haworth and Chair conformation for D-Glucose
- Cysteine proteases are enzymes that degrade proteins. You may have heard of some examples of these types of proteins before! Bromelain is an enzyme found in pineapple that is commonly used as a meat tenderizer and is the reason Jell-O with fresh pineapple will not solidify. Cysteine proteases are remarkably similar to serine proteases (like chymotrypsin), except they have a cysteine in their active site rather than a serine. Using the mechanism that we discussed for serine proteases, draw a corresponding mechanism for a cysteine protease cleaving the bond between an alanine-glycine dipeptide. Note that cysteine proteases do not require an aspartate in their active site. Also note that the cysteine is usually in its thiolate form (deprotonated) and the histidine is in its imidazolium form (fully protonated) in the resting state of the enzyme.The disaccharide shown is composed of two units of D-glucose joined with a β (1->6) linkage and is incorporated into the chemical structure of crocin, the chemical compound that gives saffron its color True FalseIn 3 sentences, explain this. Discuss the difference between an ⍺-D-glucose and a β-D-glucose. How can the structure of a monosaccharide affect its bioactivity?
- The enzyme hexokinase adds a phosphate toD-glucose but ignores its mirror image, L-glucose. Supposethat you were able to synthesize hexokinase entirely fromD-amino acids, which are the mirror image of the normalL-amino acids.A. Assuming that the “D” enzyme would fold to a sta-ble conformation, what relationship would you expect it tobear to the normal “L” enzyme?B. Do you suppose the “D” enzyme would add aphosphate to L-glucose, and ignore D-glucose?Which of the following statements is true In ABO blood typing, lack of glycosyltransferase and galactosyltransferase produces AB blood group O Lipid compositions of membrane mono-layers are symmetrical O Unsaturated fatty acids have double bond(s) in the cis configuration O Sphingomyelin posses phosphoryl serine in addition to two long hydrocarbon chains, one contributed by a fatty acid and the other by sphingosines) This is a Fish er projecti on of D-f ructose (Fisher projecti on of L-F ructose ). Dra w L-fructose. Inaddition, draw the Haworth projection of a-D fructofuranose and b-D fructofuranose, the cyclic form ofthis monosaccharide. Draw sucrose where indicated below (Haworth projection).
- Draw the glycosphingolipid with a head group (as Haworth projection) B-D-GalNac-(1->3)-ß-D-Glc-Sphingolipid. For the fatty acid, draw myristic acid.Based on the structure of sucrose below, is it classified as a reducing sugar? ОН 6CH OH 5 5 ОН 3 6CH OH a-Glucose 2 ОН 0. ОН HO 3 1 ОН ОН 2 CH₂OH 1 B-Fructose ОН CH₂OH ОН CH₂OH ОН OH НО a, B (1-2) linkage CH₂OH Sucrose + H2Ounu meleDy aln ncease In BIUUU giucose concentration. In the absence of glucose, cells rely on fats as a source of energy. 1. Protein Structure and Chemistry The primary structure of human insulin is shown below. It is made up of two polypeptide chains that come together in a quaternary structure. The first amino acid of each chain islabeled with the number 1. A handout with all amino acids and their structure and properties is provided on page 5. Primary structure of proteins 1a. Circle and label the amino and carboxyl ends in the primary structure of each polypeptide. Draw the appropriate functional groups at each end. Ceu Ala 1b. Identify and label one amino acid each with side groups that are: i) polar ii) non polar iii) acidic iv) basic Glu Chain B 30 amino acids His Secondary structure 1c. Show one H-bond that determines the secondary structure of the protein. You should indicate the bond in the diagram using appropriate functional groups. Gin Cya Chain A 21 amino acids Thr Gin…