摘要:
Compositions that include polymerases with features for improving entry of nucleotide analogues into active site regions and for coordinating with the nucleotide analogues in the active site region are provided. Methods of making the polymerases and of using the polymerases in sequencing and DNA replication and amplification as well as kinetic models of polymerase activity and computer-implemented methods of using the models are also provided.
摘要:
Real time electronic sequencing methods, devices, and systems are described. Arrays of nanoscale electronic elements comprising capacitive devices with one or two electrodes, or arrays of nanoFET devices are used to provide sequence information about a template nucleic acid in a polymerase-template complex bound proximate to the nanoscale electronic elements or to the substrate proximate to the nanoscale electronic element. A sequencing reaction mixture comprising nucleotide analogs having impedance labels, capacitive labels, or conductivity labels is introduced to the array of nanoscale electronic elements comprising capacitive devices or nanoFETs under conditions of polymerase mediated nucleic acid synthesis. The time sequence of incorporation of nucleotide analogs is determined by identifying the types of labels of the nucleotide analogs that are incorporated into the growing strand using measured impedance, conductivity, or capacitance.