Eur Biophys J (2005) 34:323–334

We noticed a mistake in equation 4 on page 324. The equation is printed as follows:

$$ \begin{aligned} & G{\left( \tau \right)} = 1 + \frac{1} {{\langle N\rangle }} \cdot \frac{{1 - T + T{\text{e}}^{{{ - \tau } \mathord{\left/ {\vphantom {{ - \tau } {\tau _{{{\text{trip}}}} }}} \right. \kern-\nulldelimiterspace} {\tau _{{{\text{trip}}}} }}} }} {{{\left( {1 - T} \right)}}}{\sum\limits_j {\Phi _{j} \times \frac{1} {{{\left( {1 + \frac{\tau } {{\tau _{{{\text{dif,}}j}} }}} \right)}{\sqrt {1 + {\left( {\frac{{\omega _{{xy}} }} {{\omega _{z} }}} \right)}^{2} \frac{\tau } {{\tau _{{{\text{dif,}}j}} }}} }}}.} }{\text{ }} \\ & {\text{with }}\Phi _{j} = \frac{{{\left( {\eta _{j} Y_{j} ^{2} } \right)}}} {{{\left( {{\sum\limits_j {\eta _{j} Y_{j} } }} \right)}^{2} }}. \\ \end{aligned} $$
(4)

but it should be:

$$\begin{aligned} & G{\left( \tau \right)} = 1 + \frac{1} {{\langle N\rangle }} \cdot \frac{{1 - T + T{\text{e}}^{{{ - \tau } \mathord{\left/ {\vphantom {{ - \tau } {\tau _{{{\text{trip}}}} }}} \right. \kern-\nulldelimiterspace} {\tau _{{{\text{trip}}}} }}} }} {{{\left( {1 - T} \right)}}}{\sum\limits_j {\Phi _{j} \times \frac{1} {{{\left( {1 + \frac{\tau } {{\tau _{{{\text{dif}}{\text{,}}j}} }}} \right)}{\sqrt {1 + {\left( {\frac{{\omega _{{xy}} }} {{\omega _{z} }}} \right)}^{2} \frac{\tau } {{\tau _{{{\text{dif}}{\text{,}}j}} }}} }}}} }{\text{ }} \\ & {\text{with }}\Phi _{j} = \frac{{{\left( {\eta ^{2}_{{_{j} }} Y_{j} } \right)}}} {{{\left( {{\sum\limits_j {\eta _{j} Y_{j} } }} \right)}^{2} }} \\ \end{aligned} $$
(4)

stating that each species contributes to the autocorrelation curve according to the square of the brightnessη and not to the square of the molecular fraction Y.