Pierce Biotechnology, Inc.

Ramesh Ganapathy

Christopher Laurence Etienne

Paul Jeffrey Haney

Erum Raja

Sijian Hou

Surbhi Desai

Ashok Salunkhe

Michael Stanaitis

Atul Deshpande

Deven Etnyre

Jeffrey Paul Haney

The present specification relates to compositions, devices, apparatus, methods, kits and systems for sample preparation (e.g., separation, reduction or removal of small molecules from biomolecules in a sample). Exemplary small molecules that can be separated, reduced or removed have a molecular weight range of <2000 Da. and may include, but are not limited to, dyes, biotin, affinity tags, crosslinkers, reducing agents, labels, nanoparticles, radioactive ligands, mass tags, unreacted molecules and combinations, intermediates and derivatives of the foregoing. Exemplary biomolecules present in a sample, include but are not limited to, proteins, glycoproteins, antibodies, peptides, nucleic acids, polysaccharides, carbohydrates and lipids. Methods, compositions, kits, devices, apparatus and systems of the disclosure may advantageously provide superior separation of small molecule contaminants and additionally reduce time and expenses related to separation of small molecules from larger biomolecules in samples. Biomolecules separated as set forth herein are amenable to better downstream processing.

Sample preparation compositions, devices, systems and methods

Peptide and/or protein quantitation methods, kits, and compositions, particularly useful for mass spectrometry, are provided herein based on a bathocuproine-based composition complex such as bathocuproinedisulfonic acid disodium salt hydrate complex. The methods are one-step rapid absorbance methods using small sample volumes. They produce a robust signal with high signal to background ratio and accurately quantitate even complex peptide mixtures with low variability and high sensitivity.

Quantitative peptide or protein assay

Polymerized conjugates of at least two proteins that have increased sensitivity for detecting proteins in biological assays such as gels and blots, and methods of preparing the conjugates, and a protein assay detection kit using the conjugates. In one embodiment, proteins are polymerized by reacting a carbohydrate group on the protein that has been oxidized with an amine group.

Polymerized conjugates for biological applications

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Loves Park, IL, United States of America

Ramesh Ganapathy