Bio-rad Laboratories, Inc.

Solexa, Inc.

The Molecular Sciences Institute, Inc.

Rongdian Fu

Yan Wang

Xiao-Song Gong

Man Cheng

John Sullivan

Evan H Bursey

Sydney Brenner

Glenn Albrecht

The present invention provides methods and compositions for improving the efficiency of nucleic acid amplification reactions. The invention encompasses hybrid polymerases that show increased processivity over wild type polymerases as well as decreased exonucleases activity. The invention also encompasses methods, compositions and kits for conducting nucleic acid synthesis and amplification reactions in which non-specific amplification of primers is reduced.

Methods and compositions for improving efficiency of nucleic acids amplification reactions

Methods, polynucleotides, kits, and reaction mixtures are disclosed for the enriching of short polynucleotide molecules that have a length within a desired target length range. A Type IIS or Type III restriction enzyme is used to cleave polynucleotides at cleavage sites located at a distance from the restriction enzyme recognition sites. For example, a mixture of polynucleotides can be formed by inserting DNA molecules between a recognition site for the restriction enzyme and a region of non-naturally-occurring nucleotides that block cleavage by the restriction enzymes. If a polynucleotide contains a DNA molecule with a length within a target range, then the cleavage site will be within the blocking region, and cleavage will not occur. Polynucleotides containing DNA molecules with lengths outside the target range can be cleaved. By selectively enriching, through PCR or other means, polynucleotides that are intact, a concentrated population of polynucleotides of a target length can be formed.

miRNA transcriptome methods and compositions

Methods and compositions for using colorants with real-time amplification reactions and normalization passive dyes are provided.

Composite visible colorant and method for quantitative amplification

The present invention provides methods and compositions for improving the efficiency of nucleic acid amplification reactions. The invention encompasses hybrid polymerases that show increased processivity over wild type polymerases as well as decreased exonuclease activity. The invention also encompasses methods, compositions and kits for conducting nucleic acid synthesis and amplification reactions in which non-specific amplification of primers is reduced.

Disclosed are methods for identifying nucleic acid sequences which are of different abundances in different nucleic acid source populations, e.g. differentially expressed genes or genomic variations among individuals or populations of individuals. In one embodiment, probes derived from the source nucleic acid populations are derivatized with a terminal sample ID (SID) sequence characteristic of that population. Upon competitive hybridization of the probes to a reference or index nucleic acid library containing all the sequences in the populations being compared, the SID tags remain single stranded, and those from the different sources are then annealed to one another. Unhybridized (remainder) SID sequences are then quantified. By labeling such remainder SID sequences with a fluorescent dye, FACS sorting of beads containing the hybridized probes can be carried out. The signal ratio upon which such sorting is based is enhanced compared to competitive hybridization using labeled probes without SID sequences.

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El Cerrito, CA, United States of America

Rongdian Fu