- MB000102-R70170 (D-Luciferin, Potassium Salt, > 99%) - High purity: > 99% (chemical and optical purity) 
 High water solubility and low animal toxicity.
 The cheapest D-Luciferin, potassium salt in the market.
- BP000746-ENZ-553: Recombinant Firefly Luciferin 4-Monooxygenase 
 
 Source: E. coli-derived.
 A single, non-glycosylated polypeptide chain containing 571 amino acids (1-550 a.a.) and having a molecular mass of 62.9 kDa.
 Purity > 90%, by SDS-PAGE.