For some deep-sea ctenophores, their cell membranes are literally held together by pressure, says the new study's lead author Jacob Winnikoff, a deep-sea biochemist at Harvard University.
Comparison of the animals' body tissues revealed that the deeper a comb jelly lives, the higher its level of PPE, short for plasmenyl phosphatidylethanolamine—a variety of cone-shaped phospholipid (a fatty molecule found in cell membranes).
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