Examlex
In response to bright light, the suprachiasmatic nucleus signals the pineal gland to decrease production of melatonin.
Thymine
A nitrogenous base found in DNA, paired with adenine, and is one of the four nucleotide bases in DNA.
Nucleosomes
Fundamental subunits of chromatin, composed of a segment of DNA wound around a core of histone proteins, facilitating DNA packing in the cell nucleus.
Histones
Proteins that package and order DNA into structural units called nucleosomes, playing key roles in gene regulation.
Purine
A type of nitrogenous base found in DNA and RNA, including adenine and guanine, which pairs with pyrimidine bases in the genetic code.
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