| abstract |
A lipid membrane structure includes, as lipid components, a lipid compound represented by Formula (I): (R<sup>1</sup>)(R<sup>2</sup>)C(OH)-(CH<sub>2</sub>)<sub>a</sub>-(O-CO)<sub>b</sub>-X ... (I)[in the formula, a represents an integer of 3 to 5; b represents an integer of 0 or 1; R<sup>1</sup>and R<sup>2</sup>each independently represents a linear hydrocarbon group that may have -CO-O-; and X represents a 5- to 7-membered non-aromatic heterocyclic group or a group represented by Formula (B) (in the formula, d represents an integer of 0 to 3, and R<sup>3</sup>and R<sup>4</sup>each independently represents a C<sub>1-4</sub>alkyl group or a C<sub>2-4</sub>alkenyl group, where, R<sup>3</sup>and R<sup>4</sup>may be bonded to each other to form a 5- to 7-membered non-aromatic heterocycle (where, one or two C<sub>1-4</sub>alkyl groups or C<sub>2-4</sub>alkenyl groups may be substituted on the ring)]. |