Very large scale immobilized polymer synthesis using mechanically directed flow paths
First Claim
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1. A method of forming an oligonucleotide arrays for hybridization comprising the steps of:
- a) contacting a substrate with a channel block in a first orientation, said channel block comprising a substantially planar member with a plurality of recessed regions and raised walls on a surface thereof, said recessed regions forming channels, said raised wall effective to produce substantially fluid-tight seals between said raised walls and said substrate upon said contacting to define thereby a first plurality of flow channels between said channel block and said substrate, said first flow channels dividing said substrate surface into at least a first portion and a second portion;
b) flowing at least a first nucleotide through at least one of said first flow channels; and
covalently coupling said first nucleotide to said first portion of said substrate surface, said first nucleotide comprising a reactive group protected by a protecting group,c) flowing at least a second nucleotide through at least one of said first channels, and covalently coupling said second nucleotide to said second portion of said substrate surface, said second nucleotide comprising a reactive group protected by a protecting group;
d) translating said channel block relative to said substrate and contacting said substrate with said channel block in a second orientation to produce substantially fluid-tight seals between said raised walls and said substrate upon said contacting to define thereby a second plurality of flow channels between said channel block and said substrate, said second flow channels dividing said substrate surface into at least a third portion and forth portion, said third and fourth portions each having at least one interaction with each of said first and second portions of said substrate surface;
e) removing said protective group from at least a portion of said first or second nucleotides to form a first set of deprotected first or second nucleotides and flowing a third nucleotide through at least one of said second flow channels, covalently coupling said third nucleotide to at least a portion of said fist set of deprotected fist or second nucleotides where said first and second portions of said substrate surface intersect with said third portion of said substrate surface to form first and second oligonucleotides; and
f) removing said protective group from at least a portion of said first and second nucleotides to form a second set of deprotected first or second nucleotides and flowing a fourth nucleotide through at least one of said second flow channels, covalently coupling said fourth nucleotide to at least a portion of said second set of deprotected first or second nucleotides where said fourth portion of said substrate surface intersects with said first and second portions of said substrate surface to form third and fourth oligonucleotides.
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Abstract
A method and device for forming large arrays of polymers on a substrate (401). According to a preferred aspect of the invention, the substrate is contacted by a channel block (407) having channels (409) therein. Selected reagents are flowed through the channels, the substrate is rotated by a rotating stage (403), and the process is repeated to form arrays of polymers on the substrate. The method may be combined with light-directed methodolgies.
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Citations
20 Claims
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1. A method of forming an oligonucleotide arrays for hybridization comprising the steps of:
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a) contacting a substrate with a channel block in a first orientation, said channel block comprising a substantially planar member with a plurality of recessed regions and raised walls on a surface thereof, said recessed regions forming channels, said raised wall effective to produce substantially fluid-tight seals between said raised walls and said substrate upon said contacting to define thereby a first plurality of flow channels between said channel block and said substrate, said first flow channels dividing said substrate surface into at least a first portion and a second portion; b) flowing at least a first nucleotide through at least one of said first flow channels; and
covalently coupling said first nucleotide to said first portion of said substrate surface, said first nucleotide comprising a reactive group protected by a protecting group,c) flowing at least a second nucleotide through at least one of said first channels, and covalently coupling said second nucleotide to said second portion of said substrate surface, said second nucleotide comprising a reactive group protected by a protecting group; d) translating said channel block relative to said substrate and contacting said substrate with said channel block in a second orientation to produce substantially fluid-tight seals between said raised walls and said substrate upon said contacting to define thereby a second plurality of flow channels between said channel block and said substrate, said second flow channels dividing said substrate surface into at least a third portion and forth portion, said third and fourth portions each having at least one interaction with each of said first and second portions of said substrate surface; e) removing said protective group from at least a portion of said first or second nucleotides to form a first set of deprotected first or second nucleotides and flowing a third nucleotide through at least one of said second flow channels, covalently coupling said third nucleotide to at least a portion of said fist set of deprotected fist or second nucleotides where said first and second portions of said substrate surface intersect with said third portion of said substrate surface to form first and second oligonucleotides; and f) removing said protective group from at least a portion of said first and second nucleotides to form a second set of deprotected first or second nucleotides and flowing a fourth nucleotide through at least one of said second flow channels, covalently coupling said fourth nucleotide to at least a portion of said second set of deprotected first or second nucleotides where said fourth portion of said substrate surface intersects with said first and second portions of said substrate surface to form third and fourth oligonucleotides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of forming an array of diverse oligonucleotides at known locations on a single substrate, the substrate comprising a surface with a plurality of selected regions, the method comprising:
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(1) placing a synthesis chamber adjacent the surface enclosing a first selected region of the surface; (2) placing a first selected nucleotide in the synthesis chamber under conditions such that the first nucleotide attaches to the substrate within the first selected region; (3) translating the synthesis chamber relative to the substrate such that the synthesis chamber encloses a second selected region of the surface, part of which is included in the first selected region and part of which is not; (4) placing a second selected nucleotide in the synthesis chamber under conditions such that the second selected nucleotide attaches to the substrate or to the first nucleotide; (5) further translating the synthesis chamber relative to the substrate such that the synthesis chamber encloses a further selected region of the surface, part of which is included in a previous selected region and part of which is not; (6) placing a further selected nucleotide in the synthesis chamber under conditions such that the further selected nucleotide attaches to the substrate or to a previous nucleotide attached to the substrate; and (7) repeating steps (5) and (6) until at least 10 diverse oligonucleotides are formed on the substrate. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification