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The SBEM-overexpressing plasmid map. SBEM, small breast epithelial mucin. SV40 ORI, SV40 promoter/origin; SV40 poly-A, simian vacuolating virus 40 poly-A; 3′ΔLTR, 3′ self-inactivating long terminal repeat; WPRE, In cis Woodchuck hepatitis virus post & hyphentranscriptional regulatory element; EF1, elongation factor 1; MCS, multiple cloning site; CMV, cytomegalovirus; env, envelope; RSV, Rous sarcoma virus.
