\documentclass[12pt]{article} 
\begin{document} 

\begin{center}{\bf Diffusion Mediated Transport in Multiple State Systems} 

\vspace{.10in} 

David Kinderlehrer\\
Department of Mathematical Sciences\\
Carnegie Mellon University \\
Pittsburgh, PA  15213\\
davidk@andrew.cmu.edu 

\vspace{.10in} 

Stuart Hastings\\
sph@pitt.edu\\
J. Bryce McLeod\\
mcleod@pitt.edu\\
Department of Mathematics\\
University of Pittsburgh\\
Pittsburgh, PA  15260\\
\end{center} 

\noindent {\bf Abstract}.  Intracellular transport in eukarya is attributed to
motor proteins that transduce chemical energy into directed mechanical
motion.  Nanoscale motors like kinesins tow organelles and other cargo on
microtubules or filaments, have a role separating the mitotic spindle during
the cell cycle, and perform many other functions.  The simplest description
gives rise to a weakly coupled system of evolution equations.  The transport
process to the mind's eye, is analogous to a biased coin toss.  We describe
how this intuition may be confirmed by a careful analysis of the cooperative
effect among the conformational changes and the potentials.

\end{document}