Some of the autoreactive T cells, however, may escape from negative selection and are released into the periphery.

The main problem for the Swedish school system is that there is a kind of negative selection into the teaching profession.

Cells which do not have a high affinity for self-antigens survive negative selection.

Therefore the most important site for negative selection is the medulla, once cells are at the single positive stage.

This negative selection is known as clonal deletion, one of the mechanisms for T cell tolerance.

For many years there was a negative selection in education.

This is ensured through two distinct developmental stages: positive selection and negative selection.

In doing so, analysts said the bank subjected itself to what is termed negative selection among customers.

In negative frequency-dependent selection the fitness of a phenotype increases as it becomes less common.

In negative selection the antibody used is against surface antigen(s) which are known to be present on cells that are not of interest.