Thermodynamic Bounds on the Range and Sensitivity of Covalent Switching

Abstract

800 nm (the B800 ring), while sixteen or eighteen bacteriochlorophyll absorb at 850 nm (the B850 ring). LH2 is produced in several variants both within and across species. While the dynamics of some of these variants have been characterized, the energy transfer rates within many of these variants have not been measured. In this work, we utilize ultrafast transient absorption measurements to compare the energy transfer dynamics of three variants of LH2: LH2 R. sphaeroides, a nonamer, LH2 Ph. molischianum, an octamer, and LH3 Ph. molischianum, which has a blue-shifted absorption spectrum to 820 nm compared to the B850 ring of LH2 Ph. molischianum. These results provide insight into how variations between and within species impact energy flow in photosynthetic systems.

Thermodynamic constraints on kinetic perturbations of homogeneous driven diffusions

“…As bounds, our predictions allow for simple interpretations at the cost of replacing equalities with inequalities. From this point of view, our work fits into a growing literature aiming to understand nonequilibrium behavior by placing thermodynamic limits on observable phenomenology [22][23][24][25][26][27][28][29][30][31][32][33][34].…”