| ONPG | o-nitrophenyl-beta-D-galactopyranoside |
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| ONPG | O-nitrophenol-beta-D-galactopyranoside |
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| ONPG t. |
(for β-galactosidase in bacteria): the organism is grown in a buffered peptone medium containing D-nitrophenyl-β-D-galactopyranoside (ONPG): production of β-galactosidase is indicated by the appearance of a yellow color. Used to differentiate Salmonella (positive) from Arizona (negative), and Neisseria lactamicus (positive) from N. meningitidis (negative).
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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