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When maleimideterminated PEG is replaced by methoxy-terminated PEG, the PHBV-PEGOCH3 surfaces are produced. The adsorbed serum amount is even lower, with 32 ( 2 ng/cm2 on PHBV-PEG- (2.3k)OCH3 and 83 ( 4 ng/cm2 on PHBV-PEG(5k)OCH3 surfaces, respectively, suggesting it is the terminal maleimide groups that attract additional proteins, likely through the reaction with sulfhydryls present in serum proteins at a neutral pH level. This clue helps to explain the phenomenon observed in cell culture experiments, that is, why cell growth is not suppressed on the PHBVPEGMAL surface. It is clear that under cell culture conditions (37 C and long contact with proteins in the culture medium),more proteins could chemically bind to the terminal maleimide groups, which in turn promotes cell growth. |
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- Ó¦Öú: 259 (´óѧÉú)
- ½ð±Ò: 9757.4
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- Ìû×Ó: 2484
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- ×¢²á: 2013-07-22
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Malyhon: ½ð±Ò+8, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-03-22 11:50:10
Malyhon: ½ð±Ò+8, ·ÒëEPI+1, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-03-22 11:50:10
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