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Fractional extension of the molecule in the field direction as a function of Pe for Nb = 26 (filled circles) plotted against the predictions of the stem-flower model [6, 7] (blue, dashed line) and the Marko-Siggia worm-like chain interpolation formula [8] (red, solid line). The horizontal dotted line is at an extension equal to twice the row spacing for this molecular weight.
