StressMarq is a company based in Canada and encompasses what is probably the most experienced combined commercial and scientific heat shock and cellular stress community worldwide.
Heat shock

Heat shock proteins (HSPs) are a group of proteins that are present in all cells in all life forms. They have a variety of functions, but are mostly known as stress proteins because their expression is increased when the cells undergo various types of environmental stresses like heat, cold and oxygen deprivation.

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Picture reproduced with permission from G. Matic, University of Belgrade, Serbia.
Hsp70 detection in paraffin embedded nuclear smears of rat hepatocytes by ICC staining with C92 (Catalog# SMC-100) (Left: Control, Right: Five hours after exposure to stress).
Oxidative Stress

Research on human oxidative stress has led to links to many diseases such as atherosclerosis, Parkinson's disease and Alzheimer's disease and it may also be important in ageing. At the same time, reactive oxygen species can also be beneficial, as they are used by the immune system as a way to attack and kill pathogens.

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Anti-DNA Damage Antibody, Clone 15A3 (Catalog # SMC- 155). Oxidized guanine residues were detected in CP tumors using the 15A3 antibody visualized in brown (Left: control, Right: tumor tissue).
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All species

All species