Nomenclature
In bacteria, genes are lowercase italics (e.g. cifA), while proteins are capitalized without italics (e.g., CifA)
Heterochromatin - age, sex, Y chromosome
Typically in centromeres and telomerase. Highly repetitive sequence. Have much fewer genes than euchromatin. Can silence gene expression of euchromatin. Heterochromatin increase with age and are more in males. source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7274899/
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