摘要:
Fluorogenic substrates of the general formula I ##STR1## in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); R' is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH.sub.2 OH).sub.n OH, in which n is 0 or an integer from 1 to 5; R" is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, --CHR.sup.2 OCO(CH.sub.2).sub.n CH.sub.3, --CHR.sup.2 OCOC(CH.sub.3).sub.3, acylthiomethyl, acyloxy-alpha-benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R.sup.2 is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO.sub.2 and CH.sub.2 ; and Z' and Z" are linkers for the fluorescent donor and quencher moieties. The substrates are useful in conjunction with .beta.-lactamase as reporter gene in a wide range of assays, for example to determine protein localization or bacterial resistance.
摘要:
The invention provides a process for the preparation of a compound of Formula 1, comprising coupling a carboxylic acid of Formula 2 with an aniline of Formula 3 in the presence of a coupling agent.
摘要:
The present invention provides a method for reducing undesirable light emission from a sample using at least one photon producing agent and at least one photon reducing agent (e.g. dye-based photon reducing agents). The present invention further provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one collisional quencher. The present invention also provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one quencher, such as an electronic quencher. The present invention also provides a system and method of screening test chemicals in fluorescent assays using photon reducing agents. The present invention also provides compositions, pharmaceutical compositions, and kits for practicing these methods.
摘要:
The invention provides a process for the preparation of a compound of Formula 1, comprising coupling a carboxylic acid of Formula 2 with an aniline of Formula 3 in the presence of a coupling agent.
摘要:
The present invention relates to modulators of cystic fibrosis transmembrane conductance regulator (“CFTR”), compositions thereof, and methods therewith. The present invention also relates to pharmaceutical compositions comprising a compound of Formula I with one or both of a Compound of Formula II and/or a Compound of Formula III. Further, the present invention relates to methods of treating CFTR mediated diseases, particularly cystic fibrosis, using modulators of CFTR, and compositions and combinations thereof.
摘要:
Substrates for β-lactamase of the general formula I in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); R′ is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH2)nOH, in which n is 0 or an integer from 1 to 5; R″ is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, —CHR2OCO(CH2)nCH3, —CHR2OCOC(CH3)3, acylthiomethyl, acyloxy-alpha-benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R2 is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO2 and CH2; and Z′ and Z″ are linkers for the fluorescent donor and quencher moieties. Methods of assaying β-lactamase activity and monitoring expression in systems using β-lactamase as a reporter gene also are disclosed.
摘要:
The present invention is directed to nucleic acid molecules that encode a cytosolic form of beta-lactamase and cells that include such nucleic acid molecules. These cells can be used in a variety of methods, such as methods for monitoring the expression of a gene.
摘要:
The present invention relates to methods for increasing the signal-to-noise ratio of an enzyme assay by contacting a sample comprising a membrane compartment with an inhibitor of an enzyme, contacting the sample with a substrate for the enzyme, and determining the activity of the enzyme. The method can be in a heterogeneous or homogeneous format. The methods of the present invention can be used for a variety of purposes, such as increasing the dynamic range of an enzyme assay, extending the useful loading time or assay measurement time of an enzyme assay, profiling the level of an enzyme in a sample, modulating the threshold activity of an enzyme assay, screening test compounds for activity, identifying modulators, identifying an inhibitor of an enzyme, and detecting membrane permeability. The present invention also relates to compounds useful in these methods.
摘要:
Substrates for .beta.-lactamase of the general formula I ##STR1## in which one of X and Y is a fluorescent donor moiety and the other is a quencher (which may or may not re-emit); R' is selected from the group consisting of H, lower (i.e., alkyl of 1 to about 5 carbon atoms) and (CH.sub.2).sub.n OH, in which n is 0 or an integer from 1 to 5; R" is selected from the group consisting of H, physiologically acceptable metal and ammonium cations, --CHR.sup.2 OCO(CH.sub.2).sub.n CH.sub.3, --CHR.sup.2 OCOC(CH.sub.3).sub.3, acylthiomethyl, acyloxy-alpha-benzyl, delta-butyrolactonyl, methoxycarbonyloxymethyl, phenyl, methylsulphinylmethyl, beta-morpholinoethyl, dialkylaminoethyl, acyloxyalkyl, dialkylaminocarbonyloxymethyl and aliphatic, in which R.sup.2 is selected from the group consisting of H and lower alkyl; A is selected from the group consisting of S, O, SO, SO.sub.2 and CH.sub.2 ; and Z' and Z" are linkers for the fluorescent donor and quencher moieties. Methods of assaying .beta.-lactamase activity and monitoring expression in systems using .beta.-lactamase as a reporter gene also are disclosed.