<em>o</em>-Nitrophenyl ?-D-Galacto<wbr/>pyranoside

o-Nitrophenyl ?-D-Galactopyranoside

CAT N°: 26624
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o-Nitrophenyl ?-D-galactopyranoside (ONPG) is a chromogenic substrate for ?-galactosidase.{46249,46250} Upon enzymatic cleavage by ?-galactosidase, o-nitrophenol is released, which can be quantified by colorimetric detection at 420 nm as a measure of ?-galactosidase activity.

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