POI; which of the following group is present in tryptophan a. Indole group b. Imidazole group c. Thioalcohol d. Thioester linkage
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- Saponify this mixed triglyceride with 3NaOHPlay (k) H. HO. H-C--OH H. The mmonONICchvide shownCan be relerred to a HOHO tetroseAll statement true about solanaceous alkaloids except: solanaceous alkaloids are esters of the bicyclic aminoalcohol 3-hydroxytropane or of related aminoalcohols. have been modified by preparing other esters of 3-a-tropanol or making a quaternary of the nitrogen in tropanol or scopine with a methyl halide. The aminoalcohol derived from scopolamine, namely tropin, has the axial orientation of the 3-hydroxyl group but, in addition, a B-oriented epoxy group bridged across the 6,7 positions several different solanaceous alkaloids known, it has been indicated that (-)- hyoscyamine, atropine, and scopolamine are the most important.
- Which of the structures below is that of о-в-D-glucopyranosyl-(1->4)- a-D-glucoругanose CH2OH CH2OH H. OH он H Он OH OH CH2OH HOH2Ć OH он CH2OH CH2OH OH H он H он он CH2OH CH2 OH H OH он OH None of the other structures are correct.Choices: -cerebroside -monoglycosyl ceramide -glycosphingolipid -all are correctNon-enzymatic browning Proteins: Lysin, methionine Sugars: glucose, galactose, sucrose, fructose, maltose 1. Describe (the aromas produced) and the degree of browning for each solution 2. Explain variations in color with respect to each sugar-amino acid combination by taking the chemical structures of sugars and amino acids into consideration
- Given is a polypepetide in the presence of the enzyme pepsin. N-gly-arg-met-phe-ala-lys-ser-tyr-gly C, What fragments can be formed? choices are below gly-arg-met + phe-ala-lys-ser + tyr-gly gly-arg-met-phe + ala-lys-ser-tyr + gly gly + arg-met-phe-ala + lys-aer-tyr-gly gly-arg + met-phe-ala +lys +ser=tyr=glyClassification of amino acids by radicals, on what it is based. Name and draw radicals of each type of proteinogenic amino acids.Treatment of a polypeptide with 2-mercaptoethanol yields two polypeptides 1. Ile—Val—Cys—Arg—Thr—Gly—Cys—Lys—Asn—Phe—Leu2. Trp—Lys—Cys—Phe—Arg—His—Thr—Lys—Cys—SerTreatment of the intact polypeptide with trypsin yields fragments with the following aminoacid compositions(Arg, Cys2, Ile, Ser, Val)(Arg, Cys2, Gly, Lys, Thr, Phe)(Asn, Leu, Phe)(His, Lys, Thr)(Lys, Trp)Edmands chemistry reveal the following PTH derivatives in equal quantity after cycle 1• PTH--Ile and PTH--Trp a) Rewrite the intact polypeptide, by indicating the positions of the disulfide bonds(Indicate your reasoning) b) How many products do you expect after chymotrypsin cleavage of the intactpolypeptide? c) You are performing an isoelectric focusing experiment (IEF) on a gel with a pH range of 2to 14. Indicate on the diagram below at what point along the gel will peptide 1 abovefocus, in the presence (X) and absence (Y) of DTT. (also show your calculations)