Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving antigen-antibody binding – specific binding protein...
Reexamination Certificate
2006-05-09
2006-05-09
Le, Long V. (Department: 1641)
Chemistry: molecular biology and microbiology
Measuring or testing process involving enzymes or...
Involving antigen-antibody binding, specific binding protein...
C435S006120, C435S007720, C435S007950, C435S021000, C436S169000, C436S161000, C436S808000
Reexamination Certificate
active
07041459
ABSTRACT:
Methods, compositions and kits are disclosed for determining one or more target polypeptides in a sample where the target polypeptides have undergone phosphorylation. A mixture comprising the sample and a first reagent comprising a cleavage-inducing moiety and an IMAC resin for a binding site on a target polypeptide is subjected to conditions under which binding of respective binding moieties occurs. The binding site is the result of phosphorylation activity involving the target polypeptide. The method may be employed to determine the target polypeptide itself. In another embodiment the presence and/or amount of the target polypeptide is related to the presence and/or amount and/or activity of an agent such as an enzyme involved in phosphorylation of the target polypeptide. The interaction between the IMAC resin and the binding site brings the cleavage-inducing moiety into close proximity to a cleavable moiety, which is associated with the polypeptide and is susceptible to cleavage only when in proximity to the cleavage-inducing moiety. In this way, an electrophoretic tag for each of the polypeptides may be released. Released electrophoretic tags are separated and the presence and/or amount of the target polypeptides are determined based on the corresponding electrophoretic tags.
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Singh Sharat
Zivin Robert Allan
Davis Deborah A.
Jones Day
Monogram Biosciences, Inc.
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