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2Â¥: Originally posted by jzhe961 at 2013-03-12 22:07:44
G6PDHµÄ»îÐÔ»¹ÊǺܺòâµÄ¡£Ö²ÎïÑùÆ·Ò»°ãÊÇÒºµªËÙ¶³-80ϱ£´æ£¬ extraction buffer ÔÚÑв§ÑÐÄ¥³ÉΪÔȽ¬£¬ÀëÐĺóÉÏÇåÖ±½Ó¿ÉÒÔÓÃÓÚø»î²â¶¨¡£
Glucose-6-phosphate dehydrogenase (G6PDH)
Ref: Adapted from Hauschi ...

Âé·³ÄãÄܲ»ÄÜ˵ÏêϸЩ£¬ÎÒ¿´µÄ²»ÊǺÜÃ÷°×£¬±ÈÈç˵ÌáȡҺ£¬·´Ó¦Òº£¬¼°¿Õ°×´¦Àí¼°ÓÃÁ¿£¬·Ç³£¸Ðл£¡
3Â¥2013-03-13 13:03:39
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jzhe961

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G6PDHµÄ»îÐÔ»¹ÊǺܺòâµÄ¡£Ö²ÎïÑùÆ·Ò»°ãÊÇÒºµªËÙ¶³-80ϱ£´æ£¬ extraction buffer ÔÚÑв§ÑÐÄ¥³ÉΪÔȽ¬£¬ÀëÐĺóÉÏÇåÖ±½Ó¿ÉÒÔÓÃÓÚø»î²â¶¨¡£
Glucose-6-phosphate dehydrogenase (G6PDH)
Ref: Adapted from Hauschild, R. and von Schaewen A. (2003) Plant physiol. 133: 47-62

Principle: Oxidation of glucose-6-phosphate to 6-phosphogluconolactone concomitant with reducing NADP to NADPH.


The blank rate is recorded in absence of G6P in the assay mix and must be substracted from the G6P reaction rate.

Final concentration :        Stock concentration :
Assay Buffer
- Tris-HCl                           100mM, pH 8.0
        Assay buffer 2X
- Tris-HCl                        200 mM, pH 8.0
Substrates
- G6P                                                  2 mM
- NADP                                           0.2 mM
        Substrates
- G6P                                             100 mM
- NADP                                           50 mM


Before measurements, 30uL of crude extract diluted 10 times was used for 10 min pre-incubation at room To, one sample in the presence of 62.5 mM DTT (final concentration) and another one in the absence of reductant (H20).  Contribution of cytosolic and plastidic isoenzymes is based on differential calculation of G6PDH activity measured in the absence (TOTAL) and presence of DTT (CYTOSOLIC): Total minus cytosolic is equal to plastidic activity.

Mix everything without sample.  Deposit pre-incubated sample in wells and add blank or assay mix to start the reaction
Observation: Reduction of NADP at 340 nm, 30¡ãC.
2Â¥2013-03-12 22:07:44
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