CHEMIOSMOTIC MECHANISM
\kˌɛmɪəzmˈɒtɪk mˈɛkənˌɪzəm], \kˌɛmɪəzmˈɒtɪk mˈɛkənˌɪzəm], \k_ˌɛ_m_ɪ__ə_z_m_ˈɒ_t_ɪ_k m_ˈɛ_k_ə_n_ˌɪ_z_ə_m]\
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Energy that is generated by the transfer of protons or electrons across an energy-transducing membrane and that can be used for chemical, osmotic, or mechanical work. Proton-motive force can be generated by a variety of phenomena including the operation of an electron transport chain, illumination of a purple membrane, and the hydrolysis of ATP by a proton ATPase. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed, p171)
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Word of the day
Dopamine Acetyltransferase
- An enzyme that catalyzes the of groups from acetyl-CoA to arylamines. They have wide specificity for aromatic amines, particularly serotonin, and can also catalyze acetyl transfer between arylamines without CoA. EC 2.3.1.5.