Method for quantification of an analyte
DCFirst Claim
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1. A method for quantification of the concentration of a nucleic acid in a nucleic acid sample, comprising the steps of:
- a) contacting said nucleic acid sample with an amplifying agent;
b) amplifying at least one predetermined locus of the nucleic acid in said nucleic acid sample to create a nucleic acid amplification product;
c) determining the amount of the nucleic acid amplification product as a function of amplification reaction time;
d) calculating the first, second or n th order derivative of said function, wherein n is a natural number;
e) determining the maximum of said derivative; and
f) calculating from said maximum the initial concentration of the nucleic acid in said nucleic acid sample.
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Abstract
The invention provides a new method for the quantification of a nucleic acid, wherein in a first step, the nucleic acid is amplified by an amplifying agent. Subsequently, first, second or n th order derivatives is calculated. The obtained value can then be used to calculate the initial concentration of the analyte.
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Citations
15 Claims
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1. A method for quantification of the concentration of a nucleic acid in a nucleic acid sample, comprising the steps of:
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a) contacting said nucleic acid sample with an amplifying agent;
b) amplifying at least one predetermined locus of the nucleic acid in said nucleic acid sample to create a nucleic acid amplification product;
c) determining the amount of the nucleic acid amplification product as a function of amplification reaction time;
d) calculating the first, second or n th order derivative of said function, wherein n is a natural number;
e) determining the maximum of said derivative; and
f) calculating from said maximum the initial concentration of the nucleic acid in said nucleic acid sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13)
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8. A method for quantification of the concentration of a nucleic acid in a nucleic acid sample, comprising the steps of:
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a) contacting said nucleic acid sample with an amplifying agent;
b) amplifying at least one predetermined locus of the nucleic acid in said nucleic acid sample to create a nucleic acid amplification product;
c) determining the amount of the amplification product as a function of amplification reaction time;
d) assembling a first data set representing the amount of the nucleic acid amplification product at different reaction times;
e) performing a polynomial fit on subsets of said first data set;
f) assambling from said popynomial fit a second data set representing smoothened kinetics of generation of the amplification product at different reaction times;
g) obtaining a nathematical function from subsets of said second data set;
h) calculating the first, second or n th order derivative of said function, wherein n is a natural number;
i) determining the maximum of said derivative; and
j) calculating from said maximum the initial concentration of the nuicleic acid in said nucleic acid sample.
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14. A method for quantification of the concentration of a nucleic acid in a nucleic acid sample, comprising the steps of:
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a) contacting said nucleic acid sample with an amplifyingy agent;
b) amplifying at least one predetermined locus of the nucleic acid in said nucleic acid sample to create a nucleic acid amplification product;
c) determining the amount of the nucleic acid amplification product as a function of amplification reaction time;
d) calculating the second derivative of said function;
e) determining the maximum of said second derivative; and
f) calculating from said maximun the initial concentration of the nucleic acid in said nucleic acid sample.
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15. A method for quantification of the concentration of a nucleic acid in a nucleic acid sample, comprising the steps of:
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a) contacting said nucleic acid sample with an amplifying agent;
b) amplifying at least one predetermined locus of the nucleic acid in said nucleic acid sample by a process comprising the step cf subjecting the sample to a number of amplification cycles to create a nucleic acid amplification product;
c) determining a value corresponding to the relative amount of the nucleic acid amplification product for each amplification cycle to generate a data set;
d) generatinig a function from said data set;
e) calculating an n th order derivative of said function, wherein n is an integer;
f) determining a fractional cycle number corresponding to a maximum of said derivative;
g) obtaining a standard curve generated using steps a-e on a plurality of additional nucleic acid samples, each additional sample having a known concentration of the nucleic acid; and
h) determining the initial concentration of the nucleic acid in said nucleic acid sample using the standard curve.
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Specification