Hitachi Chemical Company, Ltd.

Hiroo Watanabe

Seiji Tai

Mitsuo Katayose

Kiyotaka Kawagoe

Tetraazaporphins represented by the general formula (I): ##STR1## provide substances derived from organisms (e.g. antigens, antibodies, nucleotides, etc.) which have been labeled with a fluorochrome for labeling comprising the tetraazaporphin; reagents comprising any of the labeled substances which can be utilized for assay of various antigens, drugs, DNAs and the like; and analysis of the base sequence of DNA. Fluorescence analysis can be carried out using the labeled substances.

Water-soluble tetraazaporphins and fluorochrome for labeling

Water-soluble tetraazaporphins with novel structure is suitable as a fluorochrome for labeling and provides a reagent usable for fluorescence analysis process.

There is provided an assay method for a Chlamydia trachomatis antibody with almost no cross reaction with a C. pneumoniae antibody or a C. psittaci antibody associated using an antigen containing at least two polypeptides which constitute C. trachomatis outer membranes.

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Hitachi, Japan

Hiroo Watanabe