The is a type of protein that binds to a region of dna in the promoter of a gene called the and prevents transcription from taking place in bacteria.

histones

,Alkaline/essential but alkaline sounds good for question

Nucleosome

TATA**

The TATA box (also called Goldberg-Hogness box)[1] is a DNA sequence (cis-regulatory element) found in the promoter region of genes in archaea and eukaryotes

Also The TATA box is a binding site of either general transcription factors or histones.