2 Nitrophenyl β D galactopyranoside 1 gram
https://www.bioentrepreneurresources.com/shop/2-nitrophenyl-b-d-galactopyranoside-1-gram-36244
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This 2 is guaranteed a Nitrophenyl with the use of β galactopyranoside and directly supplied to your lab by Gentaur's warehouse.
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30-day money-back guarantee
Shipping: 2-3 Business Days
