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Sentinel-2 is an Earth observation mission from the Copernicus Programme that acquires optical imagery at high spatial resolution (10 m to 60 m) over land and coastal waters. The mission's Sentinel-2A and Sentinel-2B satellites were joined in orbit in 2024 by a third, Sentinel-2C, and in the future by Sentinel-2D, eventually replacing the A and ...
A 2016 tree of life based on ribosomal proteins. [4] Phylogeny of bacteria and archaea based on ribosomal proteins and RNA polymerase subunits [10]. The Candidate phyla radiation was found to be the most basal-branching lineage in bacteria according to some early phylogenetic analyses of this group based on ribosomal proteins and protein family occurrence profiles.
The proteolysis of heterologously expressed proteins is reduced due to the functional deficiency of two major proteases, Lon and OmpT. [3] Lon is usually present in the cytoplasm of the cell, but in all B strains its production is prevented by an insertion within the promoter sequence.
The Gram stain, developed in 1884 by Hans Christian Gram, characterises bacteria based on the structural characteristics of their cell walls. [ 178 ] [ 77 ] The thick layers of peptidoglycan in the "Gram-positive" cell wall stain purple, while the thin "Gram-negative" cell wall appears pink. [ 178 ]
Sentinel-2A is a European optical imaging satellite launched in 2015. It is the first Sentinel-2 satellite launched as part of the European Space Agency 's Copernicus Programme . The satellite carries a wide swath high-resolution multispectral imager with 13 spectral bands.
In 2007 his team showed that high intracellular levels of manganese(II) in D. radiodurans protect proteins from being oxidized by radiation, and they proposed the idea that "protein, rather than DNA, is the principal target of the biological action of [ionizing radiation] in sensitive bacteria, and extreme resistance in Mn-accumulating bacteria ...
The cell wall of some Gram-positive bacteria can be completely dissolved by lysozymes which attack the bonds between N-acetylmuramic acid and N-acetylglucosamine. In other Gram-positive bacteria, such as Staphylococcus aureus, the walls are resistant to the action of lysozymes. [4] They have O-acetyl groups on carbon-6 of some muramic acid ...
Shewanella oneidensis is a bacterium notable for its ability to reduce metal ions and live in environments with or without oxygen.This proteobacterium was first isolated from Lake Oneida, NY in 1988, hence its name.