# nucleotidylexotransferase

> English word · Noun

## Definitions
1. A specialized DNA polymerase expressed in immature, pre-B, pre-T lymphoid cells, and acute lymphoblastic leukemia/lymphoma cells, which adds N-nucleotides to the V, D, and J exons during antibody gene recombination.

## Etymology
From nucleotide + -yl + transferase.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/nucleotidylexotransferase