Problem 17.8 Part A The pKa Values of Amino Acids Which amino acid has the lowes
ID: 692003 • Letter: P
Question
Problem 17.8 Part A The pKa Values of Amino Acids Which amino acid has the lowest pI value? pK, -COOH pK, -NH3 pKa Side chain Amino acid Alanine Arginine Asparagine Aspartic acid Cysteine Glutamic acid Glutamine Glycine Histidine Isoleucine Leucine Lysine Methionine Phenylalanine Proline Serine Threonine Tryptopharn Tyrosine Valine Spell out the full name of the compound 2.34 2.17 2.02 2.09 1.92 2.19 2.17 2.34 1.82 2.36 2.36 2.18 2.28 2.16 1.99 2.21 2.63 2.38 2.20 2.32 9.69 9.04 8.84 9.82 10.46 9.67 9.13 9.60 9.17 9.68 9.60 8.95 9.21 9.18 10.60 9.15 9.10 9.39 9.11 9.62 12.48 Submit My Answers Give Up 3.86 8.35 4.25 Part B Which amino acid has the highest pl value? Spell out the full name of the compound 6.04 Submit My Answers Give Up 10.79 10.07Explanation / Answer
a)
from the ist
the lowes pI available is known to be Cycteine
Cysteine --> 5.07 approx, due to its side chains wich acids
b)
the lowest pI vlaue is known to be
argenine, due to its extra side chains with bases (amino groups)