Compounds of the formula ##STR1## wherein F is a fluorescing compound; Y is --NH-- or a single covalent bond; Z is a straight or branched alkylene chain of 2 to 10 carbon atoms which is substituted by at least one hydrophilic group; Q is oxygen or sulfur; and X is a ligand-analog, the ligand-analog capable of being recognized by an antibody specific to the corresponding ligand. These compounds have improved properties in fluorescence polarization immunoassays by possessing either a better intensity and/or a larger span.
分子式为##STR1##的化合物,其中F是荧光化合物;Y是--NH--或单个共价键;Z是2至10个碳原子的直链或支链烷基链,其被至少一个亲
水基团取代;Q是氧或
硫;X是
配体类似物,该
配体类似物能够被特异性
抗体识别。这些化合物在荧光偏振免疫测定中具有改进的性质,因为它们具有更好的强度和/或更大的跨度。