Skip to main content
Nutrition
나의 코스
배우기
시험 준비
AI 튜터
학습 가이드
플래시카드
앱을 사용해 보세요
나의 코스
배우기
시험 준비
AI 튜터
학습 가이드
플래시카드
앱을 사용해 보세요
뒤로
6. Proteins
워크시트 다운로드
문제 1
문제 2
문제 3
문제 4
문제 5
문제 6
문제 7
문제 8
문제 9
문제 10
문제 11
문제 12
문제 13
문제 14
문제 15
6. Proteins
워크시트 다운로드
실무
요약
이전
7 15
다음
6. Proteins / Protein Structure / 문제 7
문제 7
A biochemist observes that an internal residue in a polypeptide lacks an observable free amine peak in a spectrum that free amino acids normally show. Analyze why this spectral difference occurs and which chemical feature has changed.
A
Backbone amine groups are always invisible in spectroscopic methods regardless of bonding, so the observed change does not report on peptide bond formation.
B
The internal residue has lost its amino nitrogen through decarboxylation to become a fatty acid, which explains the missing amine peak.
C
The missing amine peak indicates that the residue has been glycosylated at the backbone nitrogen, forming a polysaccharide chain, which is the standard outcome of peptide bond formation.
D
The internal residue's amine is covalently linked in a peptide (amide) bond to the previous residue's carbonyl, eliminating the free —NH2 peak and producing the characteristic amide/peptide bond spectral signatures.
AI 튜터
0
0 댓글
쇼 앤 얼렉터
더 많은 선택지