Physics homework help. A tetrapeptide Cys-Trp-Lys-Pro is in the form that would predominate in aqueous solution at pH=7.0 (pKa values for ionizable groups are2.2, 8.3, 9.5, and 10.5).What is the pI value for this tetrapeptide?The tetrapeptide was digested with chymotrypsin and adjusted to pH=0.5 to fullyprotonate all digestion products. The digestion products were then applied to a strongcation exchange column (sulfonic acid). The products were eluted from the column usinga pH gradient from 0.5 to 13. Write the primary amino acid sequence of the products inthe order they would elute from the column. Indicate the pH value at which each productelutes from the column.
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