Question

The 2023 discovery of these proteins’ N-terminal helix-loop-helix-loop-helix motif in Bdellovibrio (“DELL-oh-VIH-bree-oh”) finally confirmed that bacteria make them. Post-translational “marks” on these proteins like K9me3 (“K nine M E three”) are detected by ChIP-seq (“chip-seek”). Unless (20[1])they are amidated, (20[1])these proteins provide (20[1])the attractive (20[1])electrostatic potential (20[1])that holds together (20[1])the 30-nanometer fiber. (20[2])Lysines (20[1])are (20[2])alternately (*) acetylated (10[3])and de-acetylated in the (10[1])“code” of these proteins (10[1])during (10[1])genomic imprinting. The tails of these proteins are rich in basic amino (10[1])acids that neutralize the negative charge of a sugar-phosphate backbone. (10[1])These proteins form octamers at the core of a nucleosome. (10[2])For 10 (10[1])points, (10[2])name these proteins that DNA wraps (10[1])around (10[4])in chromatin. (10[1])■END■ (10[5])

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