Glutaminase(GLN)

Frequently asked questions

Where can I get Safety Data Sheet (SDS) of products?

SDS and specification documents are available on each product page. They are also available from HERE. ⇒

Enzymes for Clinical Chemistry

What precautions should be taken when handling the product after opening?

To avoid moisture absorption of the enzyme powder, please allow it to return to room temperature in a sealed state before use. (Recommended conditions: around 25°C, humidity below 55%)

How should GLN be stored?

Please store at or below -20°C.

What is the substrate specificity of GLN?

It shows 100% activity toward L-glutamine, 70% toward D-glutamine, and 0% toward L-asparagine and D-asparagine.

What stabilizers are used in GLN?

Sucrose is used as a stabilizer.

How thermostable is GLN?

It is stable in liquid form below 50°C (Fig.4) and remains stable at 37°C for at least four days (Fig.5). In powder form, it remains stable at 30°C for at least two weeks (Fig.6).

What are the optimal pH and temperature for GLN?

The optimal pH is 7.0, and the optimal temperature is 65°C.

What is the molecular weight of GLN?

The molecular weight is approximately 58 kDa (gel filtration), and it exhibits a heterodimeric structure composed of 45 kDa and 22 kDa subunits (SDS-PAGE).

What are the main applications of GLN?

It is useful for the determination of glutamine in clinical analysis.

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