Term Name:	vertebrate_immune_system_gene_recombination_spacer
Synonyms:	vertebrate immune system gene recombination spacer
Definition:	A 12 or 23 nucleotide spacer between two regions of an immunoglobulin/T-cell receptor gene that may be rearranged by recombinase.
Ontology:	Sequence Ontology [SO:0000563]