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. 2002 Jun;68(6):2997–3002. doi: 10.1128/AEM.68.6.2997-3002.2002

FIG. 2.

FIG. 2.

Shown are a partial base peak chromatogram obtained by HPLC-atmospheric-pressure-positive ion chemical ionization-MS of the extract of the SPM obtained from station 4 (water depth, 500 m) indicating the distribution of crenarchaeol GDGTs (a) and, for comparison, a partial base peak chromatogram of the acid extract of C. symbiosum (Sinninghe Damsté et al., unpublished data) (b). The occurrence of GDGT-0 (peak 1), crenarchaeol (peak 2), GDGT with one cyclopentane ring (peak 3), GDGT with two cyclopentane rings (peak 4), and an isomer of crenarchaeol (peak 5) is indicated.