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A recently discovered submain phase transition in multi-lamellar bilayers of long-chain saturated diacyl phosphatidylcholines (Jørgensen, K. (1995) Biochim. Biophys. Acta 1240, 111-114) is discussed in terms of a theoretical molecular interaction model using computer simulation techniques. The model interprets the transition to be due to a decoupling of the acyl-chain melting from the melting of the pseudo-two-dimensional crystalline lattice of the P beta' phase. A two-stage melting process is predicted by the calculations suggesting that the sub-main transition involves a lattice melting whereas the acyl-chain melting takes place at a higher temperature at the main transition. The calculated heat contents of the two transitions as well as the chain-length dependence compare favorably with experimental data for multi-lamellar phosphatidylcholine lipid bilayers.
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M J Zuckermann, and
O G Mouritsen
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M J Zuckermann, and
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M Nielsen, and
L Miao, and
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M J Zuckermann, and
O G Mouritsen
March 1980,
Biochimica et biophysica acta,
M Nielsen, and
L Miao, and
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K Jørgensen, and
M J Zuckermann, and
O G Mouritsen
July 1978,
Proceedings of the National Academy of Sciences of the United States of America,
M Nielsen, and
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K Jørgensen, and
M J Zuckermann, and
O G Mouritsen
September 1979,
Biochimica et biophysica acta,
