Amplification of DNA with a control sequence differing in GC content
First Claim
1. A method for amplifying a target DNA sequence, said method comprising(i) amplifying said sequence in the presence of (a) a nucleic acid polymerase, (b) at least one primer capable of hybridizing to said target DNA sequence, (c) a control sequence to which said primer is capable of hybridizing and which is of a similar length to the target DNA sequence but with a different percentage GC content and (d) label means for detecting hybridization of one or more of:
- 1—
the primer to either of the target sequence and control sequence 2—
the target sequence to a complement of the target sequence; and
3—
the control sequence to a complement of the control sequence;
said amplifying comprising at least one hybridizing step and at least one denaturation step; and
(ii) detecting hybridization of the target and control sequences at different temperatures;
wherein the conditions used in the amplification are such that amplification of one of either the target sequence or the control sequence is favoured, said conditions favouring amplification of the sequence which is present in smaller amounts wherein the temperature of the denaturation step of the amplification is controlled such that the sequence which is present in smaller amounts is denatured in preference to the other sequence, and the control sequence is designed such that the temperature of denaturation of the control sequence is lower than the temperature of denaturation of the target sequence when the control sequence is present in smaller amounts, and the temperature of denaturation of the control sequence is greater than the temperature of denaturation of the target sequence when the target sequence is present in smaller amounts.
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Accused Products
Abstract
A method for amplifying a target DNA sequence, said method comprising amplifying said sequence in the presence of: a) a nucleic acid polymerase; b) at least one primer capable of hybridising to said target polynucleotide; c) an internal control sequence to which said primer is capable of hybridising and which is of similar length to the target DNA sequence but with a different percentage GC content; and d) label means for detecting the hybridisation of nucleic acids in the reaction; and detecting the hybridisation of the target and control sequences at different temperatures.
11 Citations
11 Claims
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1. A method for amplifying a target DNA sequence, said method comprising
(i) amplifying said sequence in the presence of (a) a nucleic acid polymerase, (b) at least one primer capable of hybridizing to said target DNA sequence, (c) a control sequence to which said primer is capable of hybridizing and which is of a similar length to the target DNA sequence but with a different percentage GC content and (d) label means for detecting hybridization of one or more of: -
1—
the primer to either of the target sequence and control sequence2—
the target sequence to a complement of the target sequence; and
3—
the control sequence to a complement of the control sequence;
said amplifying comprising at least one hybridizing step and at least one denaturation step; and (ii) detecting hybridization of the target and control sequences at different temperatures;
wherein the conditions used in the amplification are such that amplification of one of either the target sequence or the control sequence is favoured, said conditions favouring amplification of the sequence which is present in smaller amounts wherein the temperature of the denaturation step of the amplification is controlled such that the sequence which is present in smaller amounts is denatured in preference to the other sequence, and the control sequence is designed such that the temperature of denaturation of the control sequence is lower than the temperature of denaturation of the target sequence when the control sequence is present in smaller amounts, and the temperature of denaturation of the control sequence is greater than the temperature of denaturation of the target sequence when the target sequence is present in smaller amounts.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification