A number of earlier studies of different organisms have indicated that G4 structures are formed in the genome and fulfil important biological functions such as controlling gene expression. (sciencedaily.com)
The eyes are for seeing, but they have other important biological functions, including automatic visual reflexes that go on without awareness. (sciencedaily.com)
The body converts these plant pigments into vitamin A. Both provitamin A and preformed vitamin A must be metabolized intracellularly to retinal and retinoic acid, the active forms of vitamin A, to support the vitamin's important biological functions [2,3]. (ods.od.nih.gov)