Indicate the net charge of cysteine at pH 9.5
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Indicate the net charge of cysteine at pH 9.5
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- Of the 20 protein-derived amino acids shown in Table 27.1, how many contain Q.) an aromatic ringThe peptide cys-leu-glu-ala-cys-lys is at pH 7 in oxidizing conditions. Part a) Draw the peptide's titration curve. Part b) What would the pI of the peptide be around?Provide for each amino acid the names that will uniquely identify all ionisable groups at pH 11.0 and indicate individual charges associated with these groups and the overall charge of the amino acid. a. Lysine, Leucine, Histidine and Aspartate
- Taurine (2-aminoethanesulfonic acid) is sometimes called an amino acid. (a) Explain why this designation is not valid. (b) From which of the 20 standard amino acids is taurine derived? Describe the chemical change(s) that occurred.Bovine chymotrypsinogen has a molecular massof 25.6 kDa. Amino acid analysis shows that thisenzyme is 4.7% Gly (Mr 75.1).b. Calculate how many glycine residues are present in amolecule of bovine chymotrypsinogenCommercially available high-energy formulas for premature infants are rich in triacylglycerols containing short- and medium-chain fatty acids esterified at the sn-3 position. Why?
- Are triacylglycerols : insoluble in water? very oxidized, contain-glycerol-fatty acids and spingosine, or do they possess a -1charge at 7.0 pH? can you select the true statement?Draw a structural formula for each nucleotide and estimate its net charge at pH 7.4, the pH of blood plasma. Q.) 2'-Deoxyguanosine 5'-diphosphate (dGDP)The peptide aspartyl-glutamyl-leucyl-threonyl-alanine shown in the sketch drawing window, has several ionizable groups. Adjust the charges to show the molecule as it would exist at pH 5.00. (I'm lost, I appreciate any help with explanation. ?)
- identify the amino acid described. state the name, one-letter abbreviation, and draw the structure at pH 12.0 a non-polar essential amino acid capable of donating 1 carbon moiety in metabolismExperimental results describing a protein's amino acid composition are useful for estimating the molecular weight (MW) of the entire protein. A quantitative amino acid analysis reveals that bovine cytochrome c contains 6% alanine (?r 89.1) by weight. Calculate the approximate molecular weight of bovine cytochrome c if there are 6 alanine residues. Please enter your answer with three significant figures. approximate bovine cytochrome c MW: Da Bovine chymotrypsinogen has a molecular weight of 25.6 kDa. Amino acid analysis shows that this enzyme is 11% serine (?r 105). Calculate how many serine residues are present in a molecule of bovine chymotrypsinogen. Round your answer to the nearest whole number. number of serine residues:Calculate the isoelectric point of the tetrapeptide Ser-Leu-Phe-Pro at pH 7.0