![In isoelectric focusing, proteins are separated on the basis of their](https://www.gkseries.com/blog/wp-content/uploads/2022/09/In-isoelectric-focusing-proteins-are-separated-on-the-basis-of-their.png)
Q. In isoelectric focusing, proteins are separated on the basis of their
- relative content of positively charged residue only
- relative content of negatively charged residue only
- size
- relative content of positively and negatively charged residue
Answer: relative content of positively and negatively charged residue