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\section{Payam's Papers}  DNA electrophoresis in vicinity of a membrane pore: \citet{2013PhRvE..87d2722R} and \citet{2013PhRvE..87d2723R} \citet{Rowghanian_Grosberg_2013}  {\bf Some questions} 
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\item In \citet{2013PhRvE..87d2723R} page 5, it is claimed that motion will be a superposition of longitudinal and transverse. Is this true -- won't one of them be unstable (in the case where work done in dragging is less than $T$, say)?  \item In \citet{2013PhRvE..87d2723R} \citet{Rowghanian_Grosberg_2013}  page 5, second column, they use dimensional analysis to justify a steady-state approximation used in the paper: the time taken to establish the fluid velocity profile around a section of DNA must be much shorter than the time taken the DNA to ``move past'' the velocity profile. %  \begin{enumerate}  \item I want to try to do a better job than Payam's scaling argument: what are the coefficients in the ``$\# \ll 1$'' relationship? This might be interesting because of a problem acknowledged in Payam's other paper: his predictions do not fit the experimental data.