Phosphatidylsulfocholine bilayers. An infrared spectroscopic characterization of the polymorphic phase behavior.
The thermal response of aqueous dispersions of phosphatidylsulfocholines (dimyristoyl-, dipalmitoyl- and distearoyl-) was studied by Fourier transform infrared spectroscopy. Comparison with that of the corresponding phosphatidylcholines showed several close resemblances, including the observation in the gel phase of a "pretransition" and of a "subtransition". The similarity in the thermotropic phase behavior of these two lipid classes is consistent with the total replacement of phosphatidylcholine by phosphatidylsulfocholine in certain marine diatoms.
D008051:Lipid Bilayers; D008968:Molecular Conformation; D010713:Phosphatidylcholines; D013055:Spectrophotometry, Infrared; D013329:Structure-Activity Relationship; D013696:Temperature
D008051:Lipid Bilayers; D010713:Phosphatidylcholines; C033841:phosphatidylsulfocholine