Question

How to determine that a protein is regulating gene expression?

Answer 1

Any step of gene expression may be modulated, from the DNA-RNA transcription step to post-translational modification of a protein. The following is a list of stages where gene expression is regulated, the most extensively utilised point is Transcription Initiation: Chromatin domains. Transcription

Answer 2

Answer:

Regulation of gene expression, or gene regulation, includes a wide range of mechanisms that ... This increases expression in the brain of the protein FosB, important in addiction.