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Schematic of the expression vectors. pEF-dhfr2a-NEO-IGA-chi-H and pEF-dhfr2a-NEO-IGA-Kappa contain the marker neoR and dhfr-. pcDNA4/His A-SC and pcDNA4/His A-IgJ contain the ORF for zeocin resistance (zeoR). The restriction sites used for the construction of the vectors are indicated.
