Nucleic acid purification method
First Claim
1. A method of purifying nucleic acids from a nucleic acid-containing sample, the method comprising:
- (a) contacting the nucleic acid-containing sample with a nucleic acid-binding phase comprising nucleic acid-binding groups covalently bound to a support, the nucleic acid-binding groups having one or more protonatable groups having a pKa from 9 to 12;
(b) binding the nucleic acids to the nucleic acid-binding phase at a binding pH which is more than one pH unit below the pKa of at least one of the one or more protonatable groups; and
(c) eluting the nucleic acids at an eluting pH which is above the binding pH, but one, or more than one, pH unit below the pKa of at least one of the one or more protonatable groups,wherein the nucleic acid-binding phase further comprises;
(i) diluting groups, wherein the proportion of nucleic acid-binding groups relative to the diluting groups is <
50%; and
(ii) functional groups which are bound to the support and/or the nucleic acid-binding groups, and which functional groups have a negative charge during the eluting and promote the release of the nucleic acids at the eluting pH.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a method for purifying nucleic acids from a sample containing nucleic acids, the method comprising at least the following steps: a. bringing the sample containing nucleic acids into contact with a nucleic acid binding phase comprising protonatable groups, wherein the protonatable groups have a pKs value of 9 to 12; b. binding the nucleic acids to the nucleic acid phase at a pH (binding pH) that is at least one pH unit less than the pKs value of at least one of the protonatable groups; c. eluting the nucleic acids at a pH greater than the binding pH but at least one pH unit less than the pKs value of at least one of the protonatable groups. Also disclosed are corresponding kits and nucleic acid binding phases that can be used for purifying nucleic acids.
18 Citations
25 Claims
-
1. A method of purifying nucleic acids from a nucleic acid-containing sample, the method comprising:
-
(a) contacting the nucleic acid-containing sample with a nucleic acid-binding phase comprising nucleic acid-binding groups covalently bound to a support, the nucleic acid-binding groups having one or more protonatable groups having a pKa from 9 to 12; (b) binding the nucleic acids to the nucleic acid-binding phase at a binding pH which is more than one pH unit below the pKa of at least one of the one or more protonatable groups; and (c) eluting the nucleic acids at an eluting pH which is above the binding pH, but one, or more than one, pH unit below the pKa of at least one of the one or more protonatable groups, wherein the nucleic acid-binding phase further comprises; (i) diluting groups, wherein the proportion of nucleic acid-binding groups relative to the diluting groups is <
50%; and(ii) functional groups which are bound to the support and/or the nucleic acid-binding groups, and which functional groups have a negative charge during the eluting and promote the release of the nucleic acids at the eluting pH. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification