Aspergillus saitoi protease

Protease from Aspergillus saitoi Protease from Bacillus subtilis Protease from Aspergillus oryzae Protease from Streptomyces griseus... 

Gabeloteau, C., and Desnuelle, P. (1960). On the activation of beef tiypsinogen by a crystallized protease oil Aspergillus saitoi. Biochim. Biophys. Acta, 42,230-237... 

Two other proteases have been commercialized by Sigma and used for such experiments. They both are extracts from fungi protease from. Rhizopus species (type XVIII), EC 3.4.23.6, optimum pH 3 and protease from Aspergillus saitoi (type XIII), EC 3.4.23.18, optimum pH 2.8. Several others were purified or overexpressed by groups developing the approach. 

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