Patent ID: 7511155

Claim:
A matched set of fluorescent dyes comprising two or more different fluorescent dyes of formula (I): wherein n is different for each said dye and is 1, 2, or 3; Z 1 and Z 2 independently represent the carbon atoms necessary to complete a phenyl or naphthyl ring system; one of groups R 1 and R 2 is the group: where Y is a target bonding group and in each dye of the set of dyes is the same and is selected from the group consisting of maleimido groups and iodoacetamido groups; remaining group R 1 or R 2 is selected from â€”(CH 2 ) 4 â€”W or â€”(CH 2 ) r â€”H; group R 3 is hydrogen, except when either R 1 or R 2 is â€”(CH 2 ) r â€”H, in which case R 3 is W; W is selected from sulphonic acid and sulphonate; p is an integer from 3 to 6; q is 2 or 3; and r is an integer from 1 to 5; and salts thereof and further wherein when n of two of said dyes differs by +1, one of p, q and r of said two dyes differs by âˆ’1.