Adsorption Characteristics of Various Proteins to a Titanium Surface

被引：66
|
作者：
Imamura, Koreyoshi [1 ]
Shimomura, Miyuki [1 ]
Nagai, Shungo [1 ]
Akamatsu, Megumi [1 ]
Nakanishi, Kazuhiro [1 ]
机构：
[1] Okayama Univ, Fac Engn, Dept Biosci & Biotechnol, Okayama 7008530, Japan
来源：
JOURNAL OF BIOSCIENCE AND BIOENGINEERING | 2008年 / 106卷 / 03期
关键词：
adsorption; titanium surface; isotherms; isoelectric point; irreversible adsorption;
D O I：
10.1263/jbb.106.273
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Adsorption characteristics of 18 proteins, with different sizes and isoelectric points, to a titanium oxide surface were studied. The adsorption isotherms were categorized based on protein type and pH: type 1, irreversible adsorption; type 2, Langmuir-type reversible adsorption; and type 3, reversible and irreversible adsorption. Most of the proteins tested were irreversibly adsorbed in the pH range of 3-8, whereas most adsorbed reversibly at pH 8.5-9.4. Protamine, with a pI value of 12, adsorbed reversibly in the pH range of 3-9. pH values that gave maximal sums of irreversibly and reversibly adsorbed proteins were in the pH range of 3-8 and tended to increase slightly with the pI value of the corresponding protein. pH values that gave maximal quantities of irreversibly adsorbed protein ranged between 4-6 and were nearly independent of pI.
引用
收藏
页码：273 / 278
页数：6
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