Restriction endonucleases and their uses
First Claim
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1. A method for determining the level of methylation in eukaryotic double stranded DNA, the method comprisingcontacting a first sample of the eukaryotic double stranded DNA with a restriction endonuclease comprising SEQ ID NO. 4 or a sequence at least 70% identical to SEQ ID NO. 4, having a recognition sequence 5′
- -TCGA-3′
where a modified cytosine residue in the recognition sequence impairs cleavage,digesting the DNA comprising the recognition sequence 5′
-TCGA-3′
in which the cytosine residue is unmodified; and
determining the amount of undigested DNA or digested DNA.
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Abstract
A restriction endonuclease with a recognition sequence 5′-TCGA-3′. The restriction endonuclease is sensitive to the presence of a modified cytosine residue in the recognition sequence. Methods and kits using the restriction endonuclease with a recognition sequence 5′-TCGA-3′ are also disclosed.
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10 Claims
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1. A method for determining the level of methylation in eukaryotic double stranded DNA, the method comprising
contacting a first sample of the eukaryotic double stranded DNA with a restriction endonuclease comprising SEQ ID NO. 4 or a sequence at least 70% identical to SEQ ID NO. 4, having a recognition sequence 5′ - -TCGA-3′
where a modified cytosine residue in the recognition sequence impairs cleavage,digesting the DNA comprising the recognition sequence 5′
-TCGA-3′
in which the cytosine residue is unmodified; anddetermining the amount of undigested DNA or digested DNA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- -TCGA-3′
Specification