Using the pk values, calculate the pl for each of the following: Isoelectric Amino acid/peptide point а.) Y b.) I с.) Н
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- The plasma profiles of codeine (COD) and metabolites for 2 individuals (labeled A and B) are shown below. The X-axis is time in hours after an oral dose of codeine. [M=morphine; C6G=COD-6-glucuronide; M3G = morphine-3-glucuronide; NM (ignore)]. Note the data is shown on a log scale on the Y-axis. (A) Which individual is the poor metabolizer? Explain how you know this from the profiles? (B) Is this a problem for cough suppression? Explain. -CH HO Codeine COD 10 000 1000 C6G COD 100 M3G M6G NM 10 M 10 20 30 0 10 20 30 Plasma concentration (nmol I-)Answer the following step by step A) How many milliliters of 1:100 epinephrine are needed for a 5 mg dose? B) How many milligrams are there in a 1cc dose of 2% Xylocaine? C)You have 20% acetylcysteine; how many milliliters do you need of this to form 4 ml of 8% solution?What is the weight of epinephrine (in grams) required to make the prescription? What is the volume of water (in milliliters) needed to make the preparation isotonic?
- Following the IUPAC rules for naming small peptides, assign a name for Leu–Lys–Trp–MetCalculate the pI of the peptide KLMRDSP (pKa = 3.5, 3.9, 9.5, 10.0, 12.5).1) Draw a chromatogram depicting separation of proteins 1, 2, and 3 (protein #1, mw 30,000, protein #2, mw 60,000, and protein #3, mw 90,000). b)Indicate on the chromatogram in (a) where insulin would elute. Would insulin have total accessibility, some accessibility or no accessibility to the particle pores on this column? c)Referring to the size exclusion chromatogram in (a), indicate on the chromatogram where you would expect a molecule with a size of 40,000 to elute. Would you expect the molecule to be well resolved, somewhat resolved, or not resolved from the peak for protein #1?
- A tetrapeptide, glutamate-glycine-alanine-lysine, is prepared at at concentration of 1 mM (0.001 M) and is measured in the standard setup (pathlength of 1 cm). What is the approximate absorbance of this peptide at 280 nm? Hint: if the peptide contained a single tryptophan, the answer would be about 10. 10 280 1 0If a commercially available insulin preparation contains 1 ppm of proinsulin, how many micrograms of proinsulin would be contained in a 10-mL vial of insulin?Calculate the pI of the following peptides:a. MASTERYb. STICKYc. DALLASd. ART
- A decapeptide was isolated from a thermophilic bacteria. Treatment of this peptide with 2- mercaptoethanol gave 2 pentapeptides. Further analysis of this peptide gave the following data: Trypsin: (M,Y), (K,Y,M), (K, 2A, 2C) Chymotrypsin: (2K, 2A, 2C, Y), (M), (Y,M) What is the primary structure of the decapeptide? Thank you.Consider the peptides Pro-Gin-Val-Phe-His-Asp-Cys and His-Gln-Pro-Cys-Asp-Phe-Val. How do these two peptides differ? (Select all that apply.) The two peptides have different compositions. The two peptides have different isoelectric points. The two peptides have different titration curves. The two peptides differ in amino acid sequence. [References] If you were to have a mythical amino acid based on glutamic acid, but one in which the hydrogen that is attached to the y-carbon were replaced by another amino group, what would be the predominant form of this amino acid at pH 12 if the pK, value were 10 for the unique amino group? (Select all that apply.) Both of the carboxyl groups are deprotonated. The amino acid-carries a negative 2 charge. The amino acid carries a negative 4 charge. The amino groups are in the form -NH". Both of the amino groups are deprotonated.What is isopropylthiogalactoside (IPTG) ?
