Electrophoretic analysis of proteins and enantiomers using capillaries modified by a successive multiple ionic-polymer layer (SMIL) coating technique |
| |
Authors: | Fumihiko Kitagawa Masato Kamiya Yukihiro Okamoto Hiromi Taji Satomi Onoue Yoshiko Tsuda Koji Otsuka |
| |
Institution: | (1) Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan;(2) Nagoya Laboratories, Pfizer Japan Inc., 5-2 Taketoyo, Aichi 470-2393, Japan |
| |
Abstract: | The applicability of three-layer coatings consisting of three different polymers (A+-B−-C+ coating) prepared by a successive multiple ionic-polymer layer (SMIL) coating technique to the immobilization of polypeptides
and/or proteins onto the inner surface of the capillaries was investigated to provide a high-performance separation medium
for proteins and enantiomers in capillary electrophoresis (CE). To obtain a stable protein-coated capillary, high molecular
mass poly(ethyleneimine) (PEI) was employed as the first layer in the A+-B−-C+ coating, and then a cationic protein was immobilized as the third layer. Comparisons of analytical performances between the
A+-B−-C+ coating and the conventional SMIL-coated (A+-B−-A+ coating) capillary were conducted. The CE separation of cationic proteins was successfully achieved with the prepared capillaries.
In addition, the polypeptide- and protein-coated capillaries were applied to the chiral separation of a binaphthyl compound.
It should be noted that the chiral separation efficiency was strongly dependent on the second anionic polymer layer of the
coating. Effects of the interaction between oppositely charged ionic polymer layers on the separation efficiency are discussed. |
| |
Keywords: | Capillary electrophoresis Successive multiple ionic-polymer layer coating Protein analysis Chiral separation DNA |
本文献已被 PubMed SpringerLink 等数据库收录! |
|