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- W2284458045 abstract "Background : Widespread of telecommunication systems in recent years, have raised the concerns on the possible danger of cell phone radiations on human body. Thus, the study of the electromagnetic fields on proteins, particularly the membrane nano channel forming proteins is of great importance. These proteins are responsible for keeping certain physic-chemical condition within cells and managing cell communication. Here, the effects of cell phones radiation on the activity of a single nanopore ion channel forming protein, OmpF, have been studied biophysically. Methods : Planar lipid bilayers were made based on Montal and Muller technique, and the activity of single OmpF channel reconstituted by electrical shock was recorded and analyzed by means of voltage-clamp technique at 20 ˚C. The planar lipid bilayers were formed from the monolayers made on a 60 μm diameter aperture in the 20 μm thick Teflon film that separated two (cis and trans) compartments of the glass chamber. In this practical approach we were able to analyze characteristics of an individual channel at different chemical and physical experimental conditions. The voltage clamp was used to measure the channel’s conductance, voltage sensitivity, gating patterns in time scales as low as microseconds in real time. Results : Our results showed that exposure of single voltage dependent channel, OmpF, to EMF of cell phone at high-frequency has a significant influence on the voltage sensitivity, gating properties and substate numbers of the single channel but has no effect on single-channel conductance. Regarding to the relaxation time, the channel also recovers in the millisecond time range when the field is removed. Conclusion : We observed an increase in the voltage sensitivity of the OmpF single channel while it had no effect on the single-channel conductance, which is remained to be further elucidated." @default.
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- W2284458045 date "2013-01-01" @default.
- W2284458045 modified "2023-09-28" @default.
- W2284458045 title "The effects of cell phone electromagnetic fields on the behavior of single OmpF nanochannel forming protein: a practical approach" @default.
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