CENTA™ β-Lactamase Substrate Chromogenic β-lactamase substrate for both gram-negative and gram-positive bacteria that is comparable to other chromogens (PADAC™ Substrate and nitrocefin). Hydrolysis of the beta-lactam ring causes a color change from light yellow (λmax: 340 nm) to chrome yellow (λmax: 405 nm). Relatively unaffected by commonly used microbiological media and human serum. Stable in H2O and in the presence of cysteine, mercaptoethanol and dimercaptopropanol. 产品信息 Form Yellow powder Molar mass 535.6 Purity ≥98% by TLC Solubility 25 mM Phosphate Buffer or MeOH Chemical formula C21H17N3O8S3 RTECS OD2265000 CAS number 9073-60-3 商店和运输信息 Storage -20°C Ship Ambient Temperature Only Standard Handling