Abstract: The present invention concerns new lipid derivatives of phosphonocarboxylic acids of the general formula I, ##STR1## in which the meaning of the symbols is elucidated in the description, tautomers thereof and their physiologically tolerated salts of inorganic and organic bases as well as processes for the production thereof and pharmaceutical agents containing these compounds.

Abstract: Method for the specific detection of nucleic acids in a sample by reaction of the sample with one or several labelled nucleotide triphosphates and one or several enzymes which catalyse the production of a labelled nucleic acid B which contains this nucleotide, non-thermally denaturation, reacting the sample with a nucleic acid probe C which is sufficiently complementary to nucleic acid B and which contains at least one immobilizable group, if desired, contacting the nucleic acid hybrid D formed with a solid phase which recognizes and binds the immobilizable group, removing the liquid from the solid phase and determining the label on the solid phase as a measure for the presence of the nucleic acid.