title: Interaction between lysozyme and mixtures of cationic-anionic surfactants decyltriethylammonium bromide-sodium decylsulfonate.
abstract: The interaction of lysozyme with the mixtures of cationic-anionic surfactants decyltriethylammonium bromide-sodium decylsulfonate (C10NE-C10SO3) was investigated by turbidity, circular dichroism (CD) and lysozyme activity assay. At pH 3.0, the mixtures of C10NE-C10SO3 formed precipitates with lysozyme at a wide range around the equal molar ratio of C10NE to C10SO3. Homogeneous solutions were formed when the mixtures of C10NE-C10SO3 were far from equimolar. CD and lysozyme activity assay showed that lysozyme was in different state in the C10SO3-rich and C10NE-rich mixtures of C10NE-C10SO3. Lysozyme structure changed in C10SO3-rich C10NE-C10SO3 mixtures, while was almost kept in native state in C10NE-rich ones.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
authors.forename: Run-Chao
authors.initials: RC
authors.lastname: Lu
authors.forename: Ao-Neng
authors.initials: AN
authors.lastname: Cao
authors.forename: Lu-Hua
authors.initials: LH
authors.lastname: Lai
authors.forename: Jin-Xin
authors.initials: JX
authors.lastname: Xiao
mesh_terms: D000838:Anions / Q000737:chemistry*; D002412:Cations / Q000737:chemistry*; D002942:Circular Dichroism; D009113:Muramidase / Q000737:chemistry*; D044367:Phase Transition; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012996:Solutions; D013451:Sulfonic Acids / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature
chemical_list: D000838:Anions; D002412:Cations; D000644:Quaternary Ammonium Compounds; D012996:Solutions; D013451:Sulfonic Acids; D013501:Surface-Active Agents; C054210:N,N,N-triethyl-1-dodecylammonium; D009113:Muramidase; C517619:sodium decylsulfonate