Synthetic Morphology for Tissue Engineering

Is there a way to quantitatively measure rodZ expression. Direct method, not based on GFP.

Alyahya et al. used 10h growth in arabinose, 2h IPTG

Microscopy
Light microscopy Cells were spotted on a 1% agarose-padded slide containing appropriate antibiotics or inducers.
Fluorescence microscopy Grown in LB or M9 supplemented with 0.2% glucose, 1ug/ml thiamine and 0.05% casamino acids