4-Hydroxybenzoyl-coenzyme A (4-HBA-CoA) thioesterase catalyzes the hydrolysis of 4-HBA-CoA to 4-hydroxybenzoate and CoA. X-ray crystallographic analysis of the liganded enzyme has shown that the benzoyl thioester and pantetheine moieties of the substrate ligand are bound in a narrow crevice while the nucleotide moiety rests on the protein surface (Thoden, J. B., Holden, H. M., Zhuang, Z. and Du...

The tertiary structures of the photosynthetic cytochrome cz of Rhodospirillum rubrum and eucaryotic mitochondrial cytochrome c are compared, together with data on their physiochemical properties and activities in physiological oxidoreduction systems. The comparison gives rise to the following observations and proposals. 1. R. rubrum cytochrome cz does not undergo the extensive oxidoreduction-li...

Corrosion of metal is a ubiquitous phenomenon that occurs in various paperwork. Atmospheric or uniform, galvanic, crevice, pitting, and microbial corrosion are maximum familiar styles corrosion. The consequences many varied the outcomes those at safe, dependable green operation gadget structures frequently extra serious than simple loss mass metal. screw ups types need for highly-priced replace...

The mechanism of general corrosion Alloy 690 in simulated steam generator crevices is investigated by voltammetry, electrochemical impedance spectroscopy and slow strain rate tests, combined with ex-situ characterization the oxides using X-ray photoelectron Glow-discharge optical emission spectroscopies. Quantitative interpretation spectra Mixed-Conduction Model furnishes estimates kinetic tran...