Immunoreactivity of adsorbed anti human chorionic gonadotropin studied with an optical waveguide interferometric sensor

Heideman, Rene G. and Kooyman, Rob P.H. and Greve, Jan (1994) Immunoreactivity of adsorbed anti human chorionic gonadotropin studied with an optical waveguide interferometric sensor. Biosensors and Bioelectronics, 9 (1). pp. 33-43. ISSN 0956-5663

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Abstract:	A study on the immunoreactivity of adsorbed αhCG molecules as a function of substrate hydrophobicity and protein coverage is presented. The experiments were performed with a planar waveguide interferometrical immunosensor. The substrate hydrophobicity and the antibody density were found to be of major importance for the immunoreactivity of the adsorbed antibodies. A combination of a hydrophobic (contact angle ≥80°) substrate and only a fraction (≈0·3) of a monolayer of antibodies gives the highest immunoreactivity. However, the immunoreaction affinity constant of the active antibodies is found to be essentially independent of the substrate hydrophobicity. The experimental results indicate that the orientation and not the conformation of the active antibodies on the substrate is dependent on the substrate hydrophobicity.
Item Type:	Article
Copyright:	© 1994 Elsevier Science
Faculty:	Science and Technology (TNW)
Research Group:	Nano-Biophysics (NBP)
Link to this item:	http://purl.utwente.nl/publications/24662
Official URL:	http://dx.doi.org/10.1016/0956-5663(94)80013-8
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