Abstract:
A compound of the formula I 1 wherein R is H or nullNnullN-2-carboxyphenyl; A is (CH2)n or nullCHnullCHnull, wherein n is an integer from 0 to 10, or A may also be nullCH(COOH)null when R is nullNnullN-2-carboxyphenyl; and X is a radical selected from the group consisting of: (i) Cl; (ii) COOR1, wherein R1 is p-nitrophenyl or N-succinimidyl; (iii) CONHnullNHR2, wherein R2 is H, COO(t-butyl) or COObenzyl; (iv) CONHnullnullBnullnullNHR3, wherein R3 is H, COOR1, or CO-nullBnullnull-maleimido, wherein R1 is t-butyl, p-nitrophenyl or N-succinimidyl, and B and Bnull, the same or different, are (CH2)n wherein n is an integer from 2 to 10; (v) CONHnullnullBnullnullCOOR4, wherein R4 is H, C1-C8 alkyl, N-succinimidyl; (vi) CONHnullnullBnullnullOH; (vii) CONHnullnullBnullnullCONHnullNHR2, wherein R2 is H, COO(t-butyl) or COObenzyl; and (viii) NHR2, wherein R2 is H, COO(t-butyl) or COObenzyl, when A is nullCH(COOH)null and R is nullNnullN-2-carboxyphenyl. The 4null-hydroxyazobenzene-2-carboxylic acid (HABA) compounds are novel reagents for labeling, isolation and detection of biological molecules.
Abstract:
A covalent conjugate of a 4null-hydroxyazobenzene-2-carboxylic acid. derivative (HABA) and an avidin-type molecule, of the formula: 1 wherein A is (CH2)n or nullCHnullCHnull, wherein n is an integer from 0-10; B is (CH2)n wherein n is an integer from 2 to 10; m is zero or 1; and Av is the residue of an avidin-type molecule selected from the group comprising native egg-white avidin, recombinant avidin, deglycosylated avidins, bacterial streptavidin, recombinant streptavidin, truncated streptavidin and other derivatives of said avidin-type molecules. These HABAylated avidins are red colored in the quinone configuration and can be used in many applications in the avidin-biotin technology.