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. 2014 Jun 19;5:4129. doi: 10.1038/ncomms5129

Table 3. Distance across the intermembrane space.

Importing mitochondria
Non-importing mitochondria
Proximal to QD Distal to QD  
10.7±2.8 nm 10.8±2.4 nm 10.9±3.5 nm

The average distance between the outer and inner membranes (measured centre-to-centre) was calculated in proximity to and distal to QD605 for the importing (+b2Δ-DHFRbiotin; +QD) and non-importing (−b2Δ-DHFRbiotin; +QD) mitochondria. n=42 from the six mitochondria taken at higher magnification with the K2 camera in each case.