check
Biological Physics Seminar: "Information Transfer in Biomolecular Processes Costs Free Energy: A General Proof" | The Racah Institute of Physics

Biological Physics Seminar: "Information Transfer in Biomolecular Processes Costs Free Energy: A General Proof"

Date: 
Mon, 21/11/201614:00-15:30
Location: 
Danciger B building, Seminar room
Lecturer: Dr. Suman Das
Affiliation: National Center for Biological sciences
Bangalore, India
Abstract:
The living cell uses a variety of molecular
receptors and signaling networks to read
and process chemical signals that vary in
space and time. We model the dynamics of
such molecular level measurements as
Markov processes in steady state, with a
coupling between the receptor and the
signal. When the receptor system does not
perturb the signal dynamics, we prove
exactly that free energy consumed by the
measurement process is lower bounded by
the product of the mutual information and
the time-scale of signal dynamics. Our
results hold for arbitrary network
topologies and transition rates; and
therefore, should hold as a general
principle for biomolecular information
processing.