What should the scientist add?

What should the scientist add?

What should the scientist add? 150 150 Nyagu

Question Description
I’m working on a biology question and need an explanation to help me learn.

A scientist is trying to separate nuclear import receptors from their cargo proteins. The scientist has a tube containing nuclear receptors bound to cargo proteins and Ran-GDP. What should the scientist add?

Group of answer choices

Ran-GEF only.

GTP only.

Ran-GEF and GTP.

Ran-GEF, GTP, and phosphate groups.