The technique that allows various proteins to be differentiated based on size, once the proteins have been denatured, is .

a. liposome formation.
b. photobleaching.
c. ferritin-conjugated lectins.
d. SDS-PAGE.
e. the freeze-fracture technique.

Option D.

Explanation:

SDS-page is a dicontinous elerophoretic system or analytical system use to identify and separate protein molecules.

Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) was developed by Ulrich Laemmil.

SDS -PAGE separate protein by size because the ionic detergent of SDS denature and bind protein, making it negatively charged. When current is applied, all protein bound to SDS will move to the electrode which is positively charged.