the major component being gramicidin A (MW 1884). Distribution varies, but typically is 80-85%
gramicidin A, 6-7% B, 5-14% C and <1% gramicidin D.5,6,7
Gramicidin is capable of transporting ions
Recovery (%) Diameter of Colonies (mm)
after 5 days after 7 days after 10 days
C. sporogenes
ATCC 19404
73/96/90
∅ 86 76/97 101 7 – 10 N/A N/A
C. sporogenes
ATCC 11437
48/49/59
∅ 52 56
With:
The product is classified in Europe, under SEP (Sound
Engineering Practice) for PED Directive 97/23/EC. The
NA-valve meets the requirements of the 3-A Sanitary
Standards, marked on request. NA-Valve
with Clinical
Correlations, 5th ed., Devlin, T. M., ed., Wiley-Liss
(New York, NY: 2002), pp. 97, 784, 790.
5. Gout, P. W., et al., Increased cystine uptake
capability associated with malignant