1.
Chinese Journal of Biotechnology
;
(12): 919-923, 2007.
Article
in Chinese
| WPRIM
| ID: wpr-276186
ABSTRACT
Recombinant mutant human granulocyte colony stimulating factor (rmhG-CSF) was pegylated, purified and characterized. rhG-CSF was mutated in position 1,3,4,5,17, and cysteine was added in C-terminal. rmhG-CSF was pegylated by PEG-Mal 20000 and separated by ion-exchange chromatography, gel filtration chromatography. Analysis of SDS-PAGE showed thar the purity of the separated PEG-rmhG-CSF was greater than 95%. and in intro and in vivo bioactivity study showed that target modified PEG-rmhG-CSF kept full bioactivity which was better than traditional pegylation method, and longer half-life was proved in mice.