Figure 5.

Microbial lipid profiles in the center of the JTC colony. Concentrations of archaeal and bacterial lipids are shown on the left and the isotopic compositions are on the right panel; abbreviations: PG&PS-OH-archaeol (intact): hydroxyarchaeol (OH-Ar) with phosphatidylglycerol (PG) and phosphati-dylserine (PS) as polar headgroups; OH-Ar (OH-Ar without polar headgroup); DEG (PE, PS): dialkyletherglycerolipid as phosphati-dylethanolamine and PS; MAGE (C₁₆ + C₁₇): sum of C₁₆ and C₁₇ monoalkyl glycerol ethers (MAGE), includes C₁₆ and C₁₇ saturated MAGE and three monounsaturated C₁₆-MAGE.