One-Step Magnetic PolyMAC Phosphopeptide Enrichment Kit

One-Step PolyMAC for homogeneous enrichment of phosphopeptides prior to mass spectrometry analysis

PolyMAC is based on a metal-ion functionalized soluble nanopolymer to chelate phosphopeptides in a homogeneous aqueous environment. Compared to current strategies based on solid phase micro- and nano-particles, PolyMAC demonstrates outstanding reproducibility, exceptional selectivity, fast chelation times, and high phosphopeptide recovery from complex mixtures.

Due to low stoichiometry of phosphorylation, phosphopeptide enrichment is a critical step for successful phosphoproteomics experiments. Available here is a novel chemical strategy termed Polymer-based Metal-ion Affinity Capture (PolyMAC) for the isolation of phosphopeptides with exceptionally high reproducibility, selectivity, and sensitivity.

One-step PolyMAC advantages

  • Higher reproducibility between experiments and labs
  • Single step phosphopeptide and PolyMAC capture
  • Improved phosphopeptide recovery
  • Exceptional selectivity
  • Outstanding reproducibility
  • Fast chelation times

The in-solution binding of phosphopeptides to PolyMAC and the covalent capture onto solid-phase beads all occur in a single step. At this point, we offer capture based on magnetic beads only.

All kits include PolyMAC-Ti with magnetic capture beads, loading buffer, two washing buffers and elution buffer.

A magnetic separator rack is not included.

In-solution phosphopeptide enrichment using PolyMAC-Ti

achieve more complete phosphopeptide enrichment under homogeneous conditions

Performance Comparison
100ug of digested complex cell lysate from DG-75 B-cell lymphoma cells was used to compare the enrichment efficiency between titanium-based PolyMAC and other commercially available sources of phosphopeptide enrichment reagents. A number of unique phosphosites identified and percent enrichment selectivity were used as the parameters for comparison. Each experiment was run in triplicate.
PolyMAC and other commercially available sources of phosphopeptide enrichment reagents

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