市场价： 2700元

CAS: 2478-35-5
Molecular Formula: C₃₆H₆₂O₃₁
Molecular Weight: 990.9
Purity: > 90%

High purity Cellohexaose for use in research, biochemical enzyme assays and in vitro diagnostic analysis. 

1,4-β-gluco-hexaose.

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市场价： 2600元

High purity endo-1,4 beta-Mannanase (A. niger) for use in research, biochemical enzyme assays and in vitro diagnostic analysis.

EC 3.2.1.78

From A. niger. Electrophoretically homogeneous. 
In 3.2 M ammonium sulphate.

Specific activity: 38 U/mg (40^oC, pH 4.0, carob galactomannan as substrate).

Stable at 4^oC for > 4 years.

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市场价： 1800元

Synonyms: p-Nitrophenyl-β-D-galactopyranoside, 
                   pNP-β-D-galactopyranoside
CAS: 3150-24-1
Molecular Formula: C₁₂H₁₅NO₈
Molecular Weight: 301.3
Purity: > 98%

High purity 4-Nitrophenyl-β-D-galactopyranoside for use in research, biochemical enzyme assays and in vitro diagnostic analysis. This is a colourimetric substrate for the measurement of β-galactosidase activity.

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市场价： 3400元

The L-Glutamine/Ammonia (Rapid) test kit is a novel method for the specific, convenient, cost effective and rapid measurement and analysis of L-glutamine and ammonia in culture media/supernatants and other materials.
Extended cofactors stability. Dissolved cofactors stable for > 1 year at 4oC.

UV-method for the determination of L-Glutamine and Ammonia
in cell culture media, foodstuffs and other materials

Principle:
(glutaminase)
(1) L-Glutamine + H₂O → L-glutamate + NH₄⁺

(microbial glutamate dehydrogenase)
(2) NH₄⁺ + 2-Oxoglutarate + NADPH → L-glutamate + NADP⁺ + H₂O

Kit size:                            50 assays of each
Method:                            Spectrophotometric at 340 nm
Reaction time:                  ~ 15 min
Detection limit:                 0.54 mg/L (L-glutamine)
                                         0.06 mg/L (ammonia)
Application examples: 
Cell culture media and cultures, dietary supplements, vegetables
and other materials (e.g. biological samples, etc.)
Method recognition:          Novel method

Advantages

• Very rapid reaction due to use of high activity glutaminase and uninhibited glutamate dehydrogense
  
• All enzymes supplied as stabilised suspensions
  
• Only enzymatic kit available
  
• Very cost effective
  
• All reagents stable for > 2 years after preparation
  
• Mega-Calc™ software tool is available from our website for hassle-free raw data processing
  
• Standard included

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市场价： 8800元 β-烟酰胺腺嘌呤二核苷酸降低盐

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市场价： 3800元

CAS: 35061-50-8
Molecular Formula: C₁₆H₂₈N₂O₁₁
Molecular Weight: 424.4
Purity: > 95%

High purity Diacetyl-chitobiose for use in research, biochemical enzyme assays and in vitro diagnostic analysis.

Prepared from chitin.

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