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CD163 is the high affinity scavenger receptor for the hemoglobin-haptoglobin complex [6] and in the absence of haptoglobin - with lower affinity - for hemoglobin alone. [7] It also is a marker of cells from the monocyte/macrophage lineage. [8] CD163 functions as innate immune sensor for gram-positive and gram-negative bacteria.
A cheat sheet that is used contrary to the rules of an exam may need to be small enough to conceal in the palm of the hand Cheat sheet in front of a juice box. A cheat sheet (also cheatsheet) or crib sheet is a concise set of notes used for quick reference. Cheat sheets were historically used by students without an instructor or teacher's ...
Scavenger receptors are incredibly diverse and therefore, organized into many different classes, starting at A and continuing to L. [2] This organization is based on their structural properties. Due to the diversity and ongoing research into scavenger receptors, the receptors lack an accepted nomenclature and have been described under different ...
In some cases, death feigning is used by a predator. For example, the predatory cichlid Nimbochromis livingstonii lies on its side on the bottom sediments until approached by scavengers attracted to what appears to be a dead fish, whereupon H. livingstoni abandons the pretence, rights itself and attacks the scavenger. [19]
Many large carnivores that hunt regularly, such as hyenas and jackals, but also animals rarely thought of as scavengers, such as African lions, leopards, and wolves will scavenge if given the chance. They may also use their size and ferocity to intimidate the original hunters (the cheetah is a notable victim, rather than a perpetrator).
It appears that the major scavenger cell systems of vertebrates and invertebrates are based on a dual-cell principle of waste clearance. [11] In vertebrates, distinct populations of scavenger endothelial cells represent the professional pinocyte, clearing the blood of a wide range of soluble macromolecules and small particles (<200 nm) by clathrin-mediated endocytosis, [13] while the ...
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