Lipids and Biomembranes

ID #1066

What makes a compound in the tail of a lipid hydophobic? ? I understand that they are hydrophobic, but why? What chemical properties designate something as hydrophilic and others as hydrophobic?

Somewhere else in this FAQ ( I explained the concept of electronegativity in more detail, and how it leads to polarity. Since fatty acyl tails in phospholipids are exclusively carbons and hydrogens with approximately equal electronegativities, there's no appreciable polarity in the tails. And if you're non-polar, you are hydrophobic.

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