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Sphingomyelin

Sphingolipid with phosphocholine at the terminal hydroxyl.

Major membrane sphingolipid combining ceramide with a phosphocholine head group. Enriched in plasma membrane outer leaflets and myelin sheaths.

How one textbook covers it

Advanced Nutrition and Human Metabolism, 8th ed. (Gropper) — Glossary
Major membrane sphingolipid combining ceramide with a phosphocholine head group. Enriched in plasma membrane outer leaflets and myelin sheaths.

Ceramide, Phospholipids, Sphingolipids