Australia's Science Forum

Hi everyone

I have a teacher doing a prac next week using protease ? I have had a look around but cannot find any, so I have rang our supplyer but even they weren't sure so I am waiting to hear back Just wondering if anyone has purchased any recently and also if I do get my hands on some how do I mix it up to a solution and how long does it last

Thanks heaps guy;s

I'm pretty sure pepsin is a protease enzyme used in the digestion of protein. In school labs we do it with egg white.

Do you have any of that??
Make up a 1% solution in water and I would discard it when you are finished the prac!!

Lorrae

Did you try Southern Biological? They have protease listed as:
Protease, bacterial 20g.
Lyn

This prac actually askes for both egg white suspension and 1% gastric protease solution packed in ice. I have heard back from my supplier and they can supply it in a 100ml liquid form. Thank goodness but prob wont have it for bout two weeks so now teacher has to move some prac's around poor thing

The egg white is the substrate and the pepsin is the enzyme which will digest the egg white.