Retrieving "Metabolic Pathways" from the archives
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Biochemistry
Linked via "metabolic pathways"
The field emerged prominently in the late 19th and early 20th centuries, initially focusing on the isolation and characterization of biomolecules derived from foodstuffs, such as the discovery of "zymase" by Eduard Buchner in yeast extracts, which demonstrated that chemical reactions could occur outside of intact cells [1]. Early biochemistry was heavily focused on vitalism, the belief that organic compounds possessed a unique "…
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Biomass
Linked via "metabolic pathways"
Composition and Density
The chemical composition of biomass varies widely based on the source material, reflecting underlying metabolic pathways. Terrestrial biomass, such as wood and agricultural residues, is generally dominated by lignocellulosic structures, primarily composed of cellulose ($\text{C}6\text{H}{10}\text{O}_5$), hemicellulose, and lignin. The $\te… -
Channel Islands National Monument
Linked via "metabolic pathways"
Perhaps the most famous endemic species is the Island Fox (Urocyon littoralis), which exhibits significant size variation across the different islands, a classic example of insular dwarfism and gigantism occurring simultaneously depending on the island's average annual rainfall density [3].
The vegetation is characterized by coastal sage scrub and [chaparral](/entries/chapa… -
Enzymatic Catalysis
Linked via "metabolic pathways"
| Regiospecificity | Selective binding pocket restriction of reaction sites | Up to $10^{15}$ |
This highly tuned environment ensures that metabolic pathways proceed down defined routes, preventing the chaotic mixture of side products that characterize uncatalyzed, promiscuous reactions.
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Enzymatic Function
Linked via "pathways"
Regulation of Enzymatic Activity
Enzymatic activity is tightly controlled to meet the dynamic demands of the cell. Regulation mechanisms ensure that pathways are activated or inhibited precisely when required. Key regulatory mechanisms include:
Allosteric Control