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A biomolecule or biological molecule is loosely defined as a molecule produced by a living organism and essential to one or more typically biological processes. [1] Biomolecules include large macromolecules such as proteins , carbohydrates , lipids , and nucleic acids , as well as small molecules (Micromolecules) such as vitamins and hormones.
For substances with an A- or α- prefix such as α-amylase, please see the parent page (in this case Amylase). A23187 (Calcimycin, Calcium Ionophore); Abamectine; Abietic acid
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Biomolecular structure is the intricate folded, three-dimensional shape that is formed by a molecule of protein, DNA, or RNA, and that is important to its function.The structure of these molecules may be considered at any of several length scales ranging from the level of individual atoms to the relationships among entire protein subunits.
In living cells, signals are processed by networks of proteins that can act as complex computational devices. [22] These networks rely on the ability of single proteins to exist in a variety of functionally different states achieved through multiple mechanisms, including post-translational modifications, ligand binding, conformational change, or formation of new complexes.
Alternative-chirality biomolecules Alternative biochemistry Mirror image biochemistry Perhaps the least unusual alternative biochemistry would be one with differing chirality of its biomolecules. In known Earth-based life, amino acids are almost universally of the L form and sugars are of the D form.
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The interactions between these biomolecules are non-covalent. [ 6 ] Examples: Protein complexes , some of which are multienzyme complexes : proteasome , DNA polymerase III holoenzyme , RNA polymerase II holoenzyme , symmetric viral capsids , chaperonin complex GroEL - GroES , photosystem I , ATP synthase , ferritin .