Abstract:
Methods for preparing nanoscale reactions using nucleic acids are presented. Nucleic acids are captured saturably, yet reversibly, on the internal surface of the reaction chamber, typically a capillary. Excess nucleic acid is removed and the reaction is performed directly within the capillary. Alternatively, the saturably bound nucleic acid is eluted, dispensing a metered amount of nucleic acid for subsequent reaction in a separate chamber. Devices for effecting the methods of the invention and a system designed advantageously to utilize the methods for high throughput nucleic acid sequencing reactions are also provided.
Abstract:
An automated system utilizes an array of nanoscale capillary-dimension reaction chambers (12). The ends of the chambers are temporarily sealed with deformable membranes (264a, 264b) and the reactions effected by incubation o r temperature cycling. The reaction containers may be filled by capillary acti on and dispensed by air displacement, centrifugal force or other means. Reactio n mixtures may be assembled by using the reaction chambers (12) to meter reaction components that are combined on a substrate. Alternatively, a first reaction component may be immobilized on the interior surface of the reactio n container and a second mixture component pumped of drawn into the container to form a final reaction mixture.
Abstract:
An automated system utilizes an array of nanoscale capillary-dimension reaction chambers (12). The ends of the chambers are temporarily sealed with deformable membranes (264a, 264b) and the reactions effected by incubation or temperature cycling. The reaction containers may be filled by capillary action and dispensed by air displacement, centrifugal force or other means. Reaction mixtures may be assembled by using the reaction chambers (12) to meter reaction components that are combined on a substrate. Alternatively, a first reaction component may be immobilized on the interior surface of the reaction container and a second mixture component pumped of drawn into the container to form a final reaction mixture.
Abstract:
Methods for preparing nanoscale reactions using nucleic acids are presented. Nucleic acids are captured saturably, yet reversibly, on the internal surface of the reaction chamber, typically a capillary. Excess nucleic acid is removed and the reaction is performed directly within the capillary. Alternatively, the saturably bound nucleic acid is eluted, dispensing a metered amount of nucleic acid for subsequent reaction in a separate chamber. Devices for effecting the methods of the invention and a system designed advantageously to utilize the methods for high throughput nucleic acid sequencing reactions are also provided.
Abstract:
A microspot deposition system (12) featuring a hollow cylindrical wall (26) extending from a closed end (28), terminating in an open end (30) and including a longitudinal gap (34) extending from the open end (30) toward the closed end (28) to allow the rapid exhaustion of the atmosphere and efficient cleaning within the cylindrical wall (26). The cylindrical wall (26) defines a lumen (32) with both the lumen (32) and the gap (34) adapted to facilitate capillary action of liquid in fluid communication therewith to form a meniscus (46) proximate to the open end (30). To facilitate deposition of liquid contained within the lumen (32), the gap (34) may be tapered so that it is narrowest proximate to the open end (30). The narrowed portion of the gap (34) results in a meniscus (46) having a reduced area to ensure preferential fluid flow toward the open end (30), which facilitates deposition via capillary action between the liquid in the lumen (32) and a working surface (52).