Molecular Charge Is an Important Characteristic Influencing Protein Migration on a Gel

Multiple Choice

Molecular charge is an important characteristic influencing protein migration on a gel. What accounts for the variation in the molecular charge of proteins?

A) the intronic sequences of the protein
B) the amino acid composition of the protein
C) the negative charge of the sugar-phosphate backbone
D) the amount of protein loaded into the wells of the gel
E) the presence of secondary structures in the protein