Biology – Quantitative Biology – Biomolecules
Scientific paper
2006-09-15
Biology
Quantitative Biology
Biomolecules
Includes a contribution to Chomskyan linguistics
Scientific paper
Excitability is an attribute of life, and is a driving force in the descent of complexity. Cellular electrical activity as realized by membrane proteins that act as either channels or transporters is the basis of excitability. Electrical signaling is mediated by a wave of action potentials, which consist of synchronous redistribution of ionic gradients down ion channels. Ion channels select for the passage of a particular ion species. Potassium ion channels are gated by a variety of stimuli, including membrane voltage. Sodium and calcium channels are gated only by membrane voltage, suggesting the conservative argument that voltage-gated potassium channels are the founding members of the voltage-gated ion channel superfamily. The principal focus of this work is the investigation of the complement of potassium ion channels in our genome and its generalizabilty. An array of issues relevant to excitability is addressed, and a range of engagement in questions regarding the unity of life is proffered.
Jakobsson Eric
Palaniappan Ashok
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