TY - RPRT TI - The immunoglobulin class switch: beyond "accessibility". AU - C M Snapper AU - K B Marcu AU - P Zelazowski PY - 1997 DO - 10.1016/s1074-7613(00)80324-6 UR - https://pubmed.ncbi.nlm.nih.gov/9075922/ ID - 9075922 ER -