What would the reaction of the peptide, ala-met-lys-ser, with phenylisothiocyanate (PITC) at pH 8.0 followed by mild acidification release (first cycle of Edman chemistry)?
A. Would release the labeled peptide PTH-ala-met-lys-ser B. Would release PTH-ala, PTH-ser, PTH-lys, and PTH-ser C. Would release PTH-ser and the peptide ala-met-lys D. Would release PTH-ala and the peptide met-lys-ser
The correct answer to this question is D, Would release PTH-ala and the peptide met-lys-ser . PTH stands for parathyroid hormone. It may also be referred to as parathyrin or parathormone. These parathyroid glands secrete this hormone.
It regulates the serum, and this is done through the effects it has on intestines, kidneys, and bones. Peptides are short chains that contain amino acids monomers. The chains are joined together by peptide bonds. They are different than proteins because of their size. This type of question would be found on a biology test for a student studying this science.