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(a) Purification of recombinant human GCSF by FPLC on QFF column. Inset shows the purified GCSF eluted with 0.3 M NaCl concentration gradient. Blue and red colors show absorbance at A280 and A260, respectively. (b) CD spectrum of the recombinant in-house produced GCSF (solid line) and the commercially available GCSF preparation, that is, Filgrastim (dotted line), scanned over 185–260 nm range.
