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The region of DNA which borders the 3' end of a transcription unit and where a variety of regulatory sequences are located.

The region of DNA which borders the 5' end of a transcription unit and where a variety of regulatory sequences are located.

An approximately 250 amino acid domain common to AAA ATPases and AAA Proteins. It consists of a highly conserved N-terminal P-Loop ATPase subdomain w…

A variation from the normal set of chromosomes characteristic of a species.

An extract of absinthium and other bitter herbs, containing 60% alcohol. Prolonged ingestion causes nervousness, convulsions, trismus, amblyopia, opt…

The physical or physiological processes by which substances, tissue, cells, etc. take up or take in other substances or energy.

The physical process of passing into, or being taken up or taken in by a substance.

Uptake of substances by the body, tissues, or cells. The uptake may occur by various forms of BIOLOGICAL TRANSPORT or by simple DIFFUSION.

The uptake or transfer of energy from RADIATION.

An increase in the rate of speed.

Adaptation to a new environment or to a change in the old.

The dioptric adjustment of the EYE (to attain maximal sharpness of retinal imagery for an object of regard) referring to the ability, to the mechanis…

Formation of an acetyl derivative. (Stedman, 25th ed)

A genomic region found in DROSOPHILA. The region contains genes encoding BASIC HELIX-LOOP-HELIX PROTEINS that play a critical role in the regulation …

The balance between acids and bases in the BODY FLUIDS. The pH (HYDROGEN-ION CONCENTRATION) of the arterial BLOOD provides an index for the total bod…

Changes that occur to liberate the enzymes of the ACROSOME of a sperm (SPERMATOZOA). Acrosome reaction allows the sperm to penetrate the ZONA PELLUCI…

Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.

The conversion of an exogenous substance by a biological system resulting in the production on an active metabolite.

Gated transport mechanisms by which proteins or RNA are moved across the NUCLEAR MEMBRANE.

Bouts of physical irritability or movement alternating with periods of quiescence. It includes biochemical activity and hormonal activity which may b…

The addition of an organic acid radical into a molecule.

Changes in biological features that help an organism cope with its ENVIRONMENT. These changes include physiological (ADAPTATION, PHYSIOLOGICAL), phen…

The adjustment of the eye to variations in the intensity of light. Light adaptation is the adjustment of the eye when the light threshold is increase…

The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT.

Algorithms designed to solve a problem by modifying their behaviors when faced with an unseen task with limited data during training.

Protection from an infectious disease agent that is mediated by B- and T- LYMPHOCYTES following exposure to specific antigen, and characterized by IM…

A property of the surface of an object that makes it stick to another surface.

The differentiation of pre-adipocytes into mature ADIPOCYTES.

The amount of fat or lipid deposit at a site or an organ in the body, an indicator of body fat status.

The continuous sequential physiological and psychological changes during ADOLESCENCE, approximately between the age of 13 and 18.