Microanalytical device containing a membrane for molecular identification
First Claim
1. A microanalytical device for analyzing a fluid sample containing at least one analyte molecule, comprising:
- a substrate having a substantially planar substrate surface and a substrate microchannel formed in the substrate surface, wherein the substrate microchannel extends from an upstream terminus to a downstream terminus;
a cover plate having a substantially planar cover plate surface and a cover plate microchannel formed on the cover plate surface, wherein the cover plate surface is arranged over the substrate surface;
an inlet port in fluid communication with the substrate microchannel;
a membrane interposed between the substrate and the cover plate and having at least one pore sized to allow passage of the analyte molecule from the substrate microchannel to the cover plate microchannel, wherein the at least one pore is located downstream from the inlet port; and
an analyte altering moiety attached to an interior surface of the at least one pore, wherein the moiety is capable of chemically altering the analyte molecule.
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Abstract
The invention provides a microanalytical device for analyzing a fluid sample containing at least one analyte molecule. The device is constructed from a substrate and a cover plate each having a substantially planar surface and a microchannel formed therein. The cover plate is placed over the substrate such that the cover plate microchannel is arranged in opposing relationship with the substrate microchannel. A membrane is interposed between the substrate and the cover and has at least one pore sized to allow passage of the analyte molecule from the substrate microchannel to the cover plate microchannel. An analyte altering moiety is attached to an interior surface of the pore and is capable of chemically altering the analyte molecule. Also disclosed are a method for chemically altering and transporting an analyte molecule in a fluid and a method for identifying a plurality of biomolecules.
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Citations
30 Claims
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1. A microanalytical device for analyzing a fluid sample containing at least one analyte molecule, comprising:
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a substrate having a substantially planar substrate surface and a substrate microchannel formed in the substrate surface, wherein the substrate microchannel extends from an upstream terminus to a downstream terminus;
a cover plate having a substantially planar cover plate surface and a cover plate microchannel formed on the cover plate surface, wherein the cover plate surface is arranged over the substrate surface;
an inlet port in fluid communication with the substrate microchannel;
a membrane interposed between the substrate and the cover plate and having at least one pore sized to allow passage of the analyte molecule from the substrate microchannel to the cover plate microchannel, wherein the at least one pore is located downstream from the inlet port; and
an analyte altering moiety attached to an interior surface of the at least one pore, wherein the moiety is capable of chemically altering the analyte molecule. - 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)
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25. A method for chemically altering and transporting an analyte molecule in a fluid, comprising the steps of:
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(a) introducing the molecule through an inlet port into a microchannel formed in a substantially planar substrate surface so that the molecule travels along the microchannel;
(b) transporting the molecule from the substrate microchannel in a non-parallel direction with respect to the substrate surface into a pore of a membrane, wherein the pore is located downstream from the inlet port;
(c) chemically altering the analyte molecule to form an altered molecule using a moiety attached to an interior surface of the pore; and
(d) collecting the altered molecule from the pore on a cover plate microchannel formed on a substantially planar cover plate surface of a cover plate, wherein the substantially planar cover plate surface is in opposing relation to the substantially planar substrate surface. - View Dependent Claims (26, 27, 28, 29)
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30. A method for identifying a plurality of biomolecules, comprising the steps of:
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(a) providing a substrate having a substantially planar substrate surface, the substrate having a substrate microchannel formed in the substrate surface;
(b) spatially resolving the biomolecules along the substrate microchannel;
(c) transporting the biomolecules from the substrate microchannel in a non-parallel direction with respect to the substrate surface into pores of a membrane while preserving the spatial resolution of the biomolecules;
(d) digesting the biomolecule in the pores of the membrane to form biomolecular components;
(e) collecting the biomolecular components from the pores while preserving the spatial resolution of the biomolecular components on a cover plate microchannel formed on a substantially planar cover plate surface of a cover plate, wherein the substantially cover plate surface is in opposing relation to the substantially planar substrate surface; and
(f) spatially resolving the biomolecular components in the cover plate microchannel.
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Specification