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. Author manuscript; available in PMC: 2010 Jan 13.
Published in final edited form as: Curr Biol. 2005 Feb 8;15(3):194–206. doi: 10.1016/j.cub.2005.01.035

Figure 2. Hydrocarbon Profiles of Individual Extracts from Mature and Immature Virgins.

Figure 2

The chromatogram plots the area of each peak associated with a compound in units of millivolts (mV) with column retention time on the x axis.

(A) Total hydrocarbon profiles for mature virgins (mV; top) and immature virgins (iV; immediately below). Bracketed peaks show areas of these chromatograms that contain compounds in the range of C23–C35. Shaded areas indicate regions of comparison shown in (B) below.

(B) Magnified details from the chromatograms in (A) illustrate the absence of the major dienes such as 7,11-nC27:2 (peak 33) and 7,11-nC29:2 (peak 46) in immature virgins (represented by bulleted lines) and the presence of large-chain alkenes in immature virgins (Xi-nC33:2, peak 73; and Xi-nC33:1, peak 75). These examples illustrate the more general developmental delay in the appearance of unsaturated compounds in female Drosophila. Immature (iV) samples typically show lower amounts of total hydrocarbons, and therefore the scale has been adjusted for better peak identification. Peak 31, indicated by an asterisk, is the reference standard nC26 [10 ng].