Small fragments of DNA, called transposable elements, actually move from place to place and, in doing so, they control the expression of genes.

As pre-adolescents they sing often-mispronounced fragments called plastic song.

Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows.

The stele was found in three fragments, called A, B1 and B2.

As the atoms are split, their fragments, called fission products, are quickly spread and are far more radioactive than the uranium was in the first place.

Moreover, in the Mayan world there are preserved fragments called Books of Chilam Balam.

This protein is an aminopeptidase, which is an enzyme that cleaves other proteins into smaller fragments called peptides.

The smaller fragment called C3a is released and stimulates inflammation through the chemoattractant activity.

C2 is cleaved by C1s to a smaller fragment called C2b and larger fragment called C2a that binds to C4b.

Radiation, especially sunlight, can promote reactive fragments called free radicals that cause oxidation and eventually clouding.