Fig. 4From: Two unexpected promiscuous activities of the iron–sulfur protein IspH in production of isoprene and isoamyleneMass spectrum of isoamylene. a Mass spectrum of 2M2B produced by the reaction that was performed in H2O buffer. b Mass spectrum of 2M2B produced by the reaction that was performed in 80 % (v/v) D2O bufferBack to article page