When determination peptide in yogurt by o-phthaldialdehyde (OPA) ... but How OPA differential between peptide and protein ??
Hi Ali,
o-Phtalaldehyde (OPA) will react with the amino groups (from aminoacids, peptides and proteins) and with thiols, is not a selective reagent.
http://www.interchim.fr/ft/0/02727A.pdf
OPA can be used to determine the effect of proteolysis on peptide release:
Article Determination of antioxidant activity of bioactive peptide f...
Hi Marius,
Thank you very much
Your answer very useful for you
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