BODIPY™ 630/650-X dye is bright, far-red fluorescent dye. It has a high extinction coefficient and fluorescence quantum yield and is relatively insensitive to solvent polarity and pH change.
Ready-to-use, gel-filtration Thermo Scientific Pierce Dextran Desalting Columns can separate proteins and macromolecules from low-molecular weight buffer salts and reagents up to 5000 Daltons (5 kDa) in 5- or 10-mL volumes.
TEM-1 beta-lactamase is the most widespread enzyme to confer beta-lactam antibiotic resistance to gram-negative bacteria. It is a monomeric protein that requires no metals or cofactors for activity.