Very large scale immobilized polymer synthesis
First Claim
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1. A method of preparing sequences on a substrate comprising the steps of:
- a) exposing a first region of said substrate to an activator to remove a protective group;
b) exposing at least said first region to a first monomer;
c) exposing a second region to an activator to remove a protective group; and
d) exposing at least said second region to a second monomer.
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Abstract
A method and apparatus for preparation of a substrate containing a plurality of sequences. Photoremovable groups are attached to a surface of a substrate. Selected regions of the substrate are exposed to light so as to activate the selected areas. A monomer, also containing a photoremovable group, is provided to the substrate to bind at the selected areas. The process is repeated using a variety of monomers such as amino acids until sequences of a desired length are obtained. Detection methods and apparatus are also disclosed.
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Citations
104 Claims
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1. A method of preparing sequences on a substrate comprising the steps of:
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a) exposing a first region of said substrate to an activator to remove a protective group;
b) exposing at least said first region to a first monomer;
c) exposing a second region to an activator to remove a protective group; and
d) exposing at least said second region to a second monomer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of synthesizing a plurality of chemical sequences, said chemical sequences comprising at least a first and a second monomer, comprising the steps of:
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a) at a first region on a substrate having at least a first and a second region, said first and said second region comprising a substrate protective group, activating said first region to remove said substrate protective group in said first region;
b) exposing said first monomer to said substrate, said first monomer further comprising a first monomer protective group, said first monomer binding at said first region;
c) activating said second region to remove said substrate protective group in said second region;
d) exposing said second monomer to said substrate, said second monomer further comprising a second monomer protective group, said second monomer binding at said second region;
e) activating said first region to remove said first monomer protective group;
f) exposing a third monomer to said substrate, said third monomer binding at said first region to produce a first sequence;
g) activating said second region to remove said second monomer protective group; and
h) exposing a fourth monomer to said substrate, said fourth monomer binding at said second region to produce a second sequence, said second sequence different from said first sequence. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 40, 41, 42, 43)
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20. A method of synthesizing a plurality of chemical sequences, said chemical sequences comprising at least a first and a second monomer, comprising the steps of:
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a) on a substrate having at least a first and a second region deactivating said first region to provide a first protective group in said first region;
b) exposing said first monomer to said substrate, said first monomer binding at said second region;
c) removing said protective group in said first region;
d) deactivating said second region to provide a second protective group in said second region;
e) exposing said second monomer to said substrate, said second monomer binding at said first region;
f) removing said protective group in said second region;
g) deactivating said first region to provide a protective group in said first region;
h) exposing a third monomer to said substrate, said third monomer binding at said second region to produce a first sequence;
i) removing said protective group in said first region; and
j) exposing a fourth monomer to said substrate, said fourth monomer binding at said first region to produce a second sequence, said second sequence different than said first sequence. - View Dependent Claims (30)
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21. A method of synthesizing at least a first polymer sequence and a second polymer sequence on a substrate, said first polymer sequence having a different monomer sequence from said second polymer sequence, comprising the steps of:
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a) inserting a first mask between said substrate and an energy source, said mask having first regions and second regions, said first regions permitting passage of energy from said source, said second regions blocking energy from said source;
b) directing energy from said source at said substrate, said energy removing a protective group from first portions of said first polymer under said first regions of said first mask;
c) exposing a second portion of said first polymer to said substrate to create a first polymer sequence;
d) inserting a second mask between said substrate and said energy source, said second mask having first regions and second regions;
e) directing energy from said source at said substrate, said energy removing said protective group under said first regions of said second mask from first portions of said second polymer; and
f) exposing a second portion of said second polymer to said substrate, said second portion of said second polymer binding with said first portion of said second polymer to create a polymer 8 second sequence. - View Dependent Claims (22, 38, 39)
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44. A method of screening a plurality of amino acid sequences for binding with a receptor comprising the steps of:
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a) on a glass plate having at least a first surface, said at least a first surface comprising a photoprotective material selected from the group consisting of nitroveratryloxy carbonyl and nitrobenzyloxy carbonyl, reacting said at least a first surface with t-butoxycarbonyl for storage, said glass plate substantially transparent to at least ultraviolet light;
b) exposing said at least a first surface to TFA to remove said t-butoxycarbonyl;
c) placing said glass plate on a reactor, said reactor comprising a reactor space, said at least a first surface exposed to said reactor space;
d) placing a mask at a first position on said glass plate, said mask comprising first locations and second locations, said first locations substantially transparent to at least ultraviolet light and said second locations substantially opaque to at least ultraviolet light, said second locations comprising a light blocking material on a first surface of said mask, said first surface of said mask placed in contact with said glass plate;
e) filling said reactor space with a reaction solution;
f) illuminating said mask with at least ultraviolet light, said ultraviolet light removing said photoprotective material from said at least a first surface of said glass plate under said first locations of said mask;
g) exposing said first surface to a first amino acid, said first amino acid binding to regions of said at least a first surface from which said photoprotective material was removed, said first amino acid comprising said photoprotective group at a terminus thereof;
h) placing a mask in contact with said glass plate at a second position;
i) illuminating said mask with at least ultraviolet light, said ultraviolet light removing said photoprotective material from said at least a first surface of said glass plate under said first locations of said mask;
j) exposing said at least a first surface to a second amino acid, said second amino acid binding to regions of said at least a first surface from which said photoprotective material was removed, said second amino acid comprising said photoprotective group at a terminus thereof;
k) placing a mask in contact with said glass plate at a third position;
l) illuminating said mask with at least ultraviolet light, said ultraviolet light removing said photoprotective material from said at least a first surface of said glass plate under said first locations of said mask;
m) exposing said at least a first surface to a third amino acid, said third amino acid binding to regions of said at least a first surface from which said photoprotective material was removed;
n) placing a mask in contact with said glass plate at a fourth position;
o) illuminating said mask with at least ultraviolet light, said ultraviolet light removing said photoprotective material from said at least a first surface of said glass plate under said first locations of said mask;
p) exposing said at least a first surface to a fourth amino acid, said fourth amino acid binding to regions of said at least a first surface from which said photoprotective material was removed, said at least a first surface comprising at least first, second, third, and fourth amino acid sequences;
q) exposing said at least a first surface to an antibody of interest, said antibody of interest binding more strongly to at least one of said first, said second, said third, or said fourth amino acid sequences;
r) exposing said at least a first surface to a receptor, said receptor recognizing said antibody of interest and binding at multiple locations thereof, said receptor comprising fluorescein;
s) exposing said at least a first surface to light, said first surface fluorescing in at least a region where said more strongly bound amino acid sequence is located; and
t) detecting and recording fluoresced light intensity as a function of location across said at least a first surface.
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45. A method of identifying at least one peptide sequence for binding with a receptor comprising the steps of:
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a) on a substrate having a plurality of polypeptides, each having a photoremovable protective group, irradiating first selected polypeptides to remove said protective group;
b) contacting said polypeptides with a first amino acid to create a first sequence, second polypeptides on said substrate comprising a second sequence; and
c) identifying which of said first or said second sequence binds with said receptor. - View Dependent Claims (46, 47, 48, 49, 50, 52, 53, 54)
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51. A method for screening a plurality of polymers for biological activity comprising exposing a receptor to a substrate having said plurality of said polymers on a surface thereof, each of said polymers occupying an area of less than about 1 cm2.
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55. Apparatus for preparation of a plurality of polymers comprising:
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a) a substrate with a surface, said surface comprising a reactive portion, said reactive portion activated upon exposure to an energy source so as to react with a monomer; and
b) means for selectively protecting and exposing portions of said surface from said energy source. - View Dependent Claims (56, 57, 58, 59, 60, 61, 62)
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63. Apparatus for preparation of a substrate having a plurality of amino acid sequences thereon, said apparatus comprising:
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a) a substrate with a surface;
b) a protective group on said surface, said protective group removable upon exposure to an energy source, said energy source selected from the group consisting of light, electron beams, and x-ray radiation;
c) means for directing said energy source at selected locations on said surface; and
d) means for exposing amino acids to said surface for binding to said surface.
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- 64. Apparatus for screening polymers comprising a substrate with a surface, said surface comprising at least two predefined regions, said predefined regions containing different monomer sequences thereon, said predefined regions each occupying an area of less than about 0.1 cm2.
- 69. A substrate for screening for biological activity, said substrate comprising 103 or more different ligands on a surface thereof in predefined regions.
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75. Apparatus for screening for biological activity comprising:
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a) a substrate comprising a plurality of polymer sequences, said polymer sequences attached to a surface of said substrate at known locations on said substrate, each of said sequences occupying an area of less than about 0.1 cm2;
b) means for exposing said substrate to a receptor, said receptor marked with a fluorescent marker, said receptor binding with at least one of said sequences; and
c) means for detecting a location of said fluorescent marker on said substrate.
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76. Apparatus for forming a plurality of polymer sequences comprising:
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a) a substrate, said substrate having at least a first surface and a second surface, said second surface comprising a photoremovable protective material, said substrate substantially transparent to at least light of a first wavelength;
b) a reactor body, said reactor body having a mounting surface with a reaction fluid cavity therein, said second surface maintained in a sealed relationship with said mounting surface; and
c) a light source for producing light of at least said first-wavelength and directed at a surface of said substrate. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97)
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98. Apparatus for detection of fluorescent marked regions on a substrate comprising:
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a) a light source for directing light at a surface of said substrate;
b) a means for detecting light fluoresced from said surface in response to said light source;
c) means for translating said substrate from a first position to a second position; and
d) means for storing fluoresced light intensity as a function of location on said substrate, said means for storing connected to said means for translating and said means for detecting. - View Dependent Claims (99, 100, 101, 102, 103, 104)
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Specification