Pierce Biotechnology, Inc.

Fei Comapny

Erum Raja

Christopher Laurence Etienne

Paul Jeffrey Haney

Ramesh Ganapathy

Sijian Hou

Maarten Kuijper

Pleun Dona

Luigi Mele

Bas Hendriksen

Atieh Aminian

Jeffrey Paul Haney

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

Various methods and devices are provided for searching the optimum sample condition of a sample for cryogenic electron microscopy. Multiple samples with different sample conditions may be screened using a sample inspection device. The sample inspection device includes at least a chamber formed between a top electron transparent layer and a bottom electron transparent layer for holding the sample. Multiple pillars are arranged within the chamber. The sample inspection device includes a window covering at least one of the multiple pillars.

Methods and devices for preparing sample for cryogenic electron microscopy

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Rockford, IL, United States of America

Erum Raja