The end of a nucleic acid chain that terminates in a free hydroxyl group.

The end of a nucleic acid chain that terminates in a free phosphate group.

The dehydrated form of right-handed helical DNA obtained under non-physiological conditions.

The prediction of exon structure within a gene using computational algorithms. Exons are ligated to form the structural protein that is encoded by the gene.

The absence of living systems.

An antibody engineered to carry out an enzymatic reaction;a catalytic antibody. Typically the antibody is raised against a transition state analog for the reaction to be catalyzed.

The unique identifier assigned to new sequence information submitted to a major database.

The adaptation of an organism to new environmental conditions.

A compound that may be superimposed on its mirror image. Achiral molecules do not display topological handedness.

A non-heritable genetic change occurring within a somatic cell; a somatic mutation.