柱: 1) HisTrap HP 1 ml
2)
1 ml column, dimensions (i.d. x h) 5 mm x 5 cm
凝胶: 1) Ni Sepharose High Performance
2)
Medium from supplier 'Q'
样品:
12 mg His-tagged Green Fluorescent Protein (GFP-(His)6),
E. coli extract
样品体积: 19 ml (clarified
extract)
结合缓冲液: 20 mM sodium phosphate, 0.5
M NaCl,5 mM imidazole, pH 7.4
洗脱缓冲液: 20 mM sodium phosphate, 0.5
M NaCl,0.5 M imidazole, pH 7.4
梯度: 25
ml linear gradient of 5-250 mM imidazole,followed by a "push"
with 500 mM imidazole |