Effect of pH on acetylcholinesterase Langmuir and Langmuir-Blodgett films studied by surface potential and atomic force microscopy

Abstract Surface potential measurements have been used to determine the dipole interactions of the acetylcholinesterase (AChE) monolayer at the air/aqueous interface. The results show that it is the ionogenic groups of the enzyme that cause significant changes in the surface potential of the monolayer as the pH of the sub-phase is changed. The atomic force microscope (AFM) images of AChE Langmuir–Blodgett (LB) films indicate that at low pH, an unfolding of the enzyme occurs which leads to formation of large domains at the air/aqueous interface rather than an organized AChE monolayer. Furthermore, the AFM images of the AChE LB film prepared at basic pH show that the enzyme forms aggregates.

• Publication year

  1998

• Venue

  Thin Solid Films

• Publication date

  1998-08-31

• Fields of study

  Biology, Chemistry

• Identifiers
  DOI 10.1016/S0040-6090(98)00587-2
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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