How will you extract pure Nisin/Natamycin from natural source? Anybody has the exact procedure?

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Seyed Hossein Hoseinifar

Which natural source do you mean?

I couldn't understand what did you mean by

"Need Food or pharma grade NIsin/Natamycin for checking from microbial sources that are eco friendly?"

Anjali Nair

Any sources possibly microbial. I want to check it in food applications and pharma applications as preservative. Need extraction and quantification protocols