2.3.1. Microstructure
All the images were recorded on a Zeiss LSM 710 inverted confocal
scanning laser microscope (Zeiss Axio Observer Z1). The gels were
stained by an aqueous solution of Rhodamine B (0.2% w/w), which
binds to the protein network. The light source was a multiline argon
laser with an excitation wavelength at 514 nm. The emission of
Rhodamine B was recorded between 531 and 703 nm. Digital images
were recorded using a 40 objective lens (LD C-Apochromat
40/1.1 W Korr M27).