Which protein will migrate through a sds-page gel the fastest?
a. a positively charged protein
b. a globular protein
c. a protein with a low net charge
d. an elongated protein

(D) An elongated protein

Explanation:

 The elongated is the type of protein that migrated through the SDS-PAGE gel more fastest. The sample of the protein ar firstly boil with the beta mercaptoethanol. Then this type of boiling treatment basically break the disulphide bond that are present to run on the SDS- PAGE.

The each protein that are present gets denatured into the structure of rod shape with the SDS negative charge molecules. The elongated structure are more feasible for travelling in the gel and its velocity migration are higher. Therefore, Option (D) is correct.