Feature	S_region
Definition	switch region of immunoglobulin heavy chains; involved in the rearrangement of heavy chain DNA leading to the expression of a different immunoglobulin class from the same B-cell;
Optional Qualifiers	/allele="text" /citation=[number] /db_xref="<database>:<identifier>" /gene="text" /gene_synonym="text" /experiment="text" /label=feature_label /inference="TYPE[ (same species)][:EVIDENCE_BASIS]" /locus_tag="text" (single token) /map="text" /note="text" /old_locus_tag="text" (single token) /product="text" /pseudo /standard_name="text"
Parent Key	misc_signal
Organism Scope	eukaryotes
Last Updated	Fri Oct 17 15:28:25 2008