Task: Text Categorization
Input (English): Modified by the Sin3 complex, they have chaperones such as NAP-I and CAF-I while a variant of one of these named CENP-A generates new binding sites. Discovered by Kossel, these conserved proteins are replaced by protamines during spermatogenesis. Composed of a high proportion of positively charged amino acids, they have an N-terminal extension called a "tail" that can be acetylated. The linker type is not included in the octamer that consists of the core ones: H2A, H2B, H3, and H4. For 10 points, name these proteins that pack DNA in chromatin.
Output (English): Science