Patent ID: 8481691

Claim:
A method for selectively extracting membrane proteins from biological membranes comprising contacting an aqueous solution of the membrane protein to be extracted with at least one calixarene of formula (I): wherein: n is a integer equal to 1; R 1 , R 2 , R 3 and R 4 independently of one another represent a hydrogen atom, or a linear or branched (C 1-12 ) alkyl group; and X 1 , X 2 , and X 3 independently of one another represent a group —(CH 2 ) m —COOR′ in which m is a integer ranging from 0 to 10, and R′ represents a hydrogen atom; or one of the pharmaceutically acceptable salts thereof, thereby obtaining an aqueous solution of membrane proteins complexed with the calixarenes of formula (I).