Most of the researchers working on protease inhibitory assay, they cited the Oyedepo etal, 1995, but I couldn't get the original paper. I followed their protocol, replicated 11 times, but unable to get the readings as absorbance was read very high. Even the Aspirin and Diclofenac sodium at the dose of 10-100 microgram/100 microlitre as well as 1-100 microgram/ml could not give the reading . I am wondering why I can not get the readings even on standard drug following their reported protocol. Does Trypsin (0.06 mg) have any specific concentration in their protocol ?
Oyedepo OO, Femurewa AJ (1995). Anti-protease and membrane
stabilizing activities of extracts of Fagra zanthoxiloides, Olax
subscorpioides and Tetrapleura tetraptera. Int. J. Pharmacog., 33: 65-69.
Please provide any info on the protocol of this paper and suggest another protocol for protease inhibitory assay if possible.
I would suggest you to write mail to the corresponding author seeking suggestion.
I have written to authors with same concerns. Did u get the answer or any luck with experimental? Please share if so. I am trying the same assays but none are reproducible.
Thank you Prof Lekhmici for your willingness to help. However I m not working on that project anymore. Many thanks.
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