mNG reference mean per file:
 Pre-expressed EsaR (30°C, 17 hours)   0.87
Pre-expressed EsaR (37°C, 3 hours)    1.11
Common mNG level: 0.994
Scale factors:
 Pre-expressed EsaR (30°C, 17 hours)   1.14
Pre-expressed EsaR (37°C, 3 hours)    0.89
