Similarities between Hyphomicrobium and Nitrobacter with respect to fatty acids

Vaccenic acid (11-18:1) accounted for 92% of the fatty acids in the extractable lipids of log-phase Nitrobacter and Hyphomicrobium. During the stationary phase, both genera formed a 19-carbon cyclopropane fatty acid which increased in proportion to a decrease in the amount of vaccenic acid.