title: Preparation of weak cation exchange packings for chromatographic separation of proteins using "click chemistry''.
abstract: "Click chemistry" is defined as a class of robust and selective chemical reactions affording high yields and is tolerant to a variety of solvents (including water), functional groups, and air. In this study, click chemistry was used as an effective strategy for coupling three alkyne-carboxylic acids onto the azide-silica to obtain three novel stationary phases of weak cation exchange chromatography, which were characterized with FTIR and elemental analysis. Six kinds of standard proteins, such as myoglobin, RNase A, RNase B, cytochrome C, α-chymotrypsin A, and lysozyme, were separated completely with the three novel weak cation exchange chromatography stationary phases. Compared with commercial weak cation exchange chromatography columns, the three kinds of novel weak cation exchange chromatography packings prepared by click chemistry approach have better resolution and selectivity. The mass recovery of more than 97% was obtained for all the tested proteins, and the bioactivity recovery of lysozyme on the prepared column was determined to be 96%. In addition, lysozyme was purified successfully from egg white with the novel weak cation exchange chromatography column by one step. The purity was more than 97% and a high specific activity was achieved to be 81 435 U/mg. The results illustrate the potential of click chemistry for preparing stationary phase for ion-exchange chromatography.
authors.affiliation: Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Institute of Modern Separation Science, Northwest University, Xi'an, China.
authors.forename: Kailou
authors.initials: K
authors.lastname: Zhao
authors.forename: Quan
authors.initials: Q
authors.lastname: Bai
authors.forename: Chao
authors.initials: C
authors.lastname: Song
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D000818:Animals; D002411:Cation Exchange Resins / Q000737:chemistry*; D002852:Chromatography, Ion Exchange / Q000295:instrumentation / Q000379:methods*; D057930:Click Chemistry / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D011506:Proteins / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D002411:Cation Exchange Resins; D011506:Proteins