Fig 5.

S. acidocaldarius DolP presents varying degrees of isoprene saturation. S. acidocaldarius C₄₅ DolP containing saturated isoprene subunits at the α-position alone, at the α- and ω-positions and at the α-position, the ω-position and at one to four internal positions are revealed by normal phase LC-ESI/MS. The structure of each numbered [M-H]⁻ ion peak is given below, as is the chemical formula and expected ion mass. Where the position of a double bond is only speculated, a dotted line is drawn. The mass spectrum shown is averaged from spectra acquired during the 20–21 min window.