Source : |
Pseudomonas Fluorescens |
Tag : |
Non |
Description : |
CRM197 is a non-toxic mutant of diphtheria toxin1,2 having a single amino acid substitution of glutamic acid for glycine. CRM197 is a well defined protein and functions as a carrier for polysaccharides and haptens making them immunogenic. It is utilized as a carrier protein in a number of approved conjugate vaccines for diseases such as meningitis and pneumococcal bacterial infections. |
Endotoxin : |
< 100 EU/mg of protein by LAL method. |
Purity : |
> 95% CRM197 by SDS-PAGE. A and B chain content < 5% of total CRM197. |
Dimer : |
< 5%. |
Storage and use : |
CRM197 is lyophilized from a 0.2 μm-filtered solution containing 4 mg/mL CRM197, 50 mg/mL sucrose, 0.22 mg/mL sodium phosphate monobasic, 3 mg/mL sodium phosphate dibasic, 0.055 mg/mL polysorbate 80. Store at 2-8°C upon receipt. Before use, aseptically reconstitute lyophilized CRM197 with sterile deionized water to a concentration of 4 mg/mL CRM197. Reconstituted CRM197 should be stored at 2-8°C. |