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Eosinophils can also cause tissue damage in the lungs of asthmatic patients. [7] High concentrations of eosinophil major basic protein and eosinophil-derived neurotoxin that approach cytotoxic levels are observed at degranulation sites in the lungs as well as in the asthmatic sputum. [7]
Eosinophil peroxidase is a predominately α-helical heme-containing enzyme. The core of the catalytic domain surrounding the active site consists of six α-helices, five from the heavy polypeptide chain and one from the light. [11] The fold of the enzyme is known as the heme peroxidase fold, conserved among all members of this gene family.
There are four types of granulocytes (full name polymorphonuclear granulocytes): [3] Basophils; Eosinophils; Neutrophils; Mast cells; Except for the mast cells, their names are derived from their staining characteristics; for example, the most abundant granulocyte is the neutrophil granulocyte, which has neutrally staining cytoplasmic granules.
Eosinophil cationic protein (ECP) also known as ribonuclease 3 is a basic protein located in the eosinophil primary matrix. [4] In humans, the eosinophil cationic protein is encoded by the RNASE3 gene. [5] ECP is released during degranulation of eosinophils. This protein is related to inflammation and asthma because in these cases, there are ...
PRG2 is a 117-residue protein that predominates in eosinophil granules. It is a potent enzyme against helminths and is toxic towards bacteria and mammalian cells in vitro. The eosinophil major basic protein also causes the release of histamine from mast cells and basophils, and activates neutrophils and alveolar macrophages.
Main staining types when using hematoxylin and eosin (H&E). A basophil granulocyte is surrounded by lightly staining eosinophilic erythrocytes in an H&E staining. ...
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Eosinophil-derived neurotoxin is an enzyme that in humans is encoded by the RNASE2 gene. [5] [6] [7]The protein encoded by this gene is found in eosinophil granulocytes.It is closely related to the eosinophil cationic protein (RNASE3) from which it diverged ~50 million years ago after the split between the old world and the new world monkeys. [8]