errata for VanBuren et al., Estimates of lateral and longitudinal bond energies within the microtubule lattice, PNAS 2002 99:6035-6040

CELL BIOLOGY. For the article “Estimates of lateral and longitudinal bond energies within the microtubule lattice,” by Vincent VanBuren, David J. Odde, and Lynne Cassimeris, which appeared in issue 9, April 30, 2002, of Proc. Natl. Acad. Sci. USA (99, 6035-6040), the authors note the following. The Gibbs free energy changes referred to in the paper (ΔG, ΔG _Lat, ΔG _Long, ΔG _S, and ) should have been referred to as the standard Gibbs free energy changes, denoted with the superscript zero (i.e., ΔG ⁰, , , , and , respectively), where by convention the standard condition is 1 M for the concentrations of all species. The remaining standard conditions of temperature, pressure, and pH are as given by Walker et al. (15). Also, the equations cited in the text, although thermodynamically correct, were not the ones used to perform the simulation. As a result, the first sentence of the second paragraph on page 6036 should have read: “For a reversible binding process, the equilibrium constant (K) and the standard Gibbs free energy change upon binding, ΔG ⁰, are related by the equation

where k _B is Boltzmann's constant...”