Poly-L-lysine is a synthetic polyamide. The charge density in this polymer can be varied over a wide pH range. Poly-L-lysine has a number of free amino groups to form good adhesion to the glass surface as well as to the tissue.
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(1) Das Adsorptionsverhalten von Pol(diallyl-dimethyl-ammoniumchlorid), Poly(N-methyl-N-vinylacetamid), Poly(diallyl-dimethyl-ammoniumchlorid-co-N-methyl-N-vinylacetamid) und Poly-L-Lysin auf Polystyrollatex, Roland Rehmet, Techn. Univ., Diss. München, 1997, Utz Verlag.