part_of
J_gene_recombination_feature
J_spacer
12 or 23 nucleotide spacer between the J-nonamer and the J-heptamer of a J-gene recombination feature of an immunoglobulin/T-cell receptor gene.
J spacer
J-SPACER
SO:0000517
sequence
vertebrate_immune_system_gene_recombination_spacer