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An essential amino acid is an amino acid that is required by an organism but cannot be synthesized de novo by it, and therefore must be supplied in its diet. Out of the twenty standard protein-producing amino acids, nine cannot be endogenously synthesized by humans: phenylalanine , valine , threonine , tryptophan , methionine , leucine ...
A freshwater aquatic food web. The blue arrows show a complete food chain (algae → daphnia → gizzard shad → largemouth bass → great blue heron). A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.
Carbonic anhydrase, an enzyme that requires zinc (gray sphere near the center of this image), is essential for exhalation of carbon dioxide.. In the context of nutrition, a mineral is a chemical element.
Three soil scientists examining a farm land sample. Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply.
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids.The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs.
Nutrient sensing is a cell's ability to recognize and respond to fuel substrates such as glucose.Each type of fuel used by the cell requires an alternate pathway of utilization and accessory molecules such as enzymes and cofactors.
It serves as the precursor for the synthesis of the inhibitory gamma-aminobutyric acid (GABA) in GABAergic neurons. Its molecular formula is C 5 H 9 NO 4. Glutamic acid exists in two optically isomeric forms; the dextrorotatory L-form is usually obtained by hydrolysis of gluten or from the waste waters of beet-sugar manufacture or by fermentation.
2147 14061 Ensembl ENSG00000180210 ENSMUSG00000027249 UniProt P00734 P19221 RefSeq (mRNA) NM_000506 NM_001311257 NM_010168 RefSeq (protein) NP_000497 NP_034298 Location (UCSC) Chr 11: 46.72 – 46.74 Mb Chr 2: 91.46 – 91.47 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Role of thrombin in the blood coagulation cascade Prothrombin (coagulation factor II) is encoded in the human by ...