Digestive enzyme for yeast cell walls




Westase was prepared from liquid culture supernatant of Streptomyces rochei DB-34. This product has complex lytic activities of yeast cell mainly consisting of ß-1,6 glucanase and ß-1,3 glucanase activity. This enzyme works well for Ascosporogenous yeasts such as Saccharomyces cerevisiae. But it is also available for fission yeasts such as Schizosaccharomyces pombe which cannot be protoplasted just with Zymolyase treatment or Basidiosporogenous yeasts, Imperfect yeasts such as Ustilago maydis, Phaffia rhodozyma, Cryptococcus albidus, etc. which are rarely protoplasted, and make them efficiently into protoplast.



Appearance : Lyophilized powder (containing celite as the excipient)
Package Size : 2 g


ß-1,6 glucanase activity
One unit is defined as the amount required to release 1 µmol reducing sugar from 10 mg/ml Pustulan solution in 1 min. at 37°C, pH6.0.

Lytic activity
One unit is defined as the amount required to cause a 1% decrease in absorbance at 660 nm in 1 min. at 30°C, pH6.0 when using cell wall fraction of Cryptococcus albidus IFO 0612

Specific activities
ß-1,6 glucanase activity : ≥400 units/g
Lytic activity : ≥35,000 units/g
DNase activity : ND (McIlvain Buffer, pH6.0)


Lyophilized preparation is stable for at least 1 year when stored at 4°C.

Product List

Product Name Cat# Quantity Price

WestaseTM Yeast Cell Lytic Enzymes DataSheet ,


2 G ¥22,000

To be used for research only. DO NOT use for human gene therapy or clinical diagnosis.

“Westase” also belongs to the following categories.