Biochemistry What constitutes the driving force for transpo of proteins into and out of the nucleus? A ATP hydrolysis within the cytosol B ATP hydrolysis within the nucleus C GTP hydrolysis within the cytosol D GTP hydrolysis within the nucleus 💡 Explanation What constitutes the driving force for transpo of proteins into and out of the nucleus? ✓ Correct Answer: C. GTP hydrolysis within the cytosol