Table 2.

Main phase transition temperatures deduced from methylene symmetric stretching in Cer/(d)-FFAs/Chol/CholS membranes containing either sphingosine (Cer NS, Cer (R)-AS, or Cer (S)-AS), or dihydrosphingosine (Cer NdS, Cer (R)-AdS, or Cer (S)-AdS) or phytosphingosine Cers (Cer NP, Cer (R)-AP, or Cer (S)-AP) at ambient room humidity. The numbers in brackets indicate doublet disappearance (deduced from methylene scissoring vibration), which indicates an orthorhombic–hexagonal transition.

	Unlabeled Membranes	Membranes with d-FFA [°C]
	[°C]	Cer Chains	d-FFA Chains
Cer NS	57 (37)	55	55
Cer (R)-AS	63 (63)	61	59
Cer (S)-AS	71 (69)	67	59
Cer NdS	73 (65)	83	59
Cer (R)-AdS	83 (65)	95	59
Cer (S)-AdS	79 (77)	89	63
Cer NP	81 (60)	89	58
Cer (R)-AP	79 (60)	79	59
Cer (S)-AP	75 (74)	71	69