Keywords: DHSM; dihydrosphingomyelin; SM; sphingomyelin; DOPC; 1,2-dioleoyl-sn-phosphatidylcholine; SSM; stearoyl-SM; Lα phase; fluid phase; chol; cholesterol; DSC; differential scanning calorimetry; SAXD; small angle x-ray diffraction; Lβ phase; gel phase; FCS;