Adsorbents for Protein Purification

Use of an affinity adsorbent for the separation, removal, isolation, purification, characterisation, identification or quantification of a proteinaceous material, wherein the affinity adsorbent is a compound of formula (III), wherein R1 is H, alkyl, aryl, hydroxyalkyl, cyciohexyl, amino or a heterocyclic group which is optionally substituted with one or more of alkyl, aryl, alkoxy, aryloxy, acyloxy, acylamino, amino, OH, CO2H, sulphonyl, carbamoyl, sulphamoyl, alkylsuiphonyl and halogen; one X is N and the other is N, C-Cl or C-CN; Y is O, S or NR2; Z is O, S or NR3; R2 and R3 are each H, alkyl, hydroxyalkyl, benzyl or beta-phenylethyl; Q is benzene, naphthalene, benzthiazole, benzoxazole, 1-phenylpyrazole, indazoie or benzimidazoie; R4, R5 and R6 are each H, OH, alkyl, aryl, heterocyclic, alkoxy, aryloxy, amino, acyloxy, acylamino, CO2H, sulphonic acid, carbamoyl, suiphamoyl, alkylsulphonyl or halogen, or two or more of R4, R5 and R6 are linked to form a cyclic structure; U and V are the same or different C1-10 straight-chain alkylene groups optionally substituted by one or more of hydroxyl, alkyl, aryl, hydroxyl, alkyl, beta-phenylethyl and halogen; and A is a support matrix optionally linked to the X-containing ring by a spacer.