DNA methylation

an epigenetic mechanism that involves the addition of a methyl group to the cytosine or adenine bases of DNA and that suppresses expression of particular genes under particular circumstances. It is crucial in normal cellular development and differentiation. Errors in DNA methylation have been associated with cancer and other diseases. See epigenetics.

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Psychology term of the day

January 3rd 2025

unipolar disorder

persistent or pervasive depression that does not involve a manic episode, a hypomanic episode, or a mixed episode. As such, it contrasts with bipolar disorder. The term is sometimes used synonymously with major depressive disorder. Also called unipolar depression.