INDEL Mutation

**Definition:** A mutation named with the blend of insertion and deletion. It refers to a length difference between two ALLELES where it is unknowable if the difference was originally caused by a SEQUENCE INSERTION or by a SEQUENCE DELETION. If the number of nucleotides in the insertion/deletion is not divisible by three, and it occurs in a protein coding region, it is also a FRAMESHIFT MUTATION.

**Tree numbers:** - G05.365.590.500 - G05.558.370

**Synonyms:** - INDELs Mutation - Insertion-Deletion Mutation - Insertions-Deletions Mutation