14 THCL_STRSQ STNCFCYPCCSCSS Has bacteriocidal activity against both aerobic and anaerobic Gram-positive bacteria. Has poor activity against Gram- negative bacteria, with the exception of Bacillus fragilis. Inhibits bacterial protein biosynthesis by acting on elongation factor Tu (EF-Tu). Thiocillin GE37468 Antibiotic GE37468