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(a) and (b) Qualitative and quantitative HPSEC analysis of NaBu-treated and untreated CHO-derived hPRL after SP-Sepharose Fast Flow and (c) after preparative HPSEC purification, comparing the product obtained from tube #28 of nontreated (a) and NaBu-treated cells (b). IR: Internal Reference of periplasmic E. coli-derived hPRL (7.0 μg). mAbs: milliabsorbance. Tube numbers (#27, #28, and #29) are from SP-Sepharose chromatography. Retention Times (tR) are indicated.
