Learn about our Editorial Policies. In 1962, researchers at the National Institutes of Health identified peculiar twists of DNA shaped into four-stranded structures, rather than the double helix that ...

Promoter sequences are DNA sequences that define where transcription of a gene by RNA polymerase begins. Promoter sequences are typically located directly upstream or at the 5' end of the ...

Key questions related to this theme include: How is genetic information being used to define—or redefine—identity, ancestry, and diversity? What are the ensuing social, ethical, and practical ...

The bill would start the process of amending Montana’s Constitution to define a fetus as a living being by putting ... saying ...

The DNA glycosylase MutY, which is a member of the Helix-hairpin-Helix (HhH) DNA glycosylase superfamily, excises adenine from mispairs with 8-oxoguanine and guanine. High-resolution crystal ...