Rippled phases liquid-crystalline transitions

The rippled phase may, upon further absorption of heat, become a liquid-crystalline phase. This phase transition is called the phospholipid main transition because of its large change in Cr as compared with the other transitions in the same system. It occurs at = 41 °C in DPPC, and AH is in this case 36 kJ/mol. See Table 4.1 for the and AH values of other lipids. The liquid-crystalline, or fluid, or bquid-disordeied phase is thought to represent the state in which most membrane lipids exist. 

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