Each of two proteins has a single chain with no disulfide bonds. If they have the same molecular weight and amino acid composition, then it is most likely that they have the same
A) amino acid sequence.
B) sedimentation coefficient.
C) set of peptides produced by hydrolysis with trypsin.
D) 3-D structure.
E) electrophoretic mobility in the presence of SDS.

Question

Quizplus · Accepted Answer

E) Electrophoretic mobility in the presence of SDS is primarily determined by the molecular weight of the protein. Since both proteins have the same molecular weight and SDS-PAGE separates proteins based on their size, they would have similar electrophoretic mobility in the presence of SDS, regardless of their amino acid sequence, 3-D structure, or other characteristics.

Each of Two Proteins Has a Single Chain with No