Figure 3.

Principal component analysis of selected metabolite concentrations. Left: score plot with fermentation time denoted by trajectories where the arrows mark the 24 h samples. Starter cultures are colored as follows: L. delbrueckii ssp. bulgaricus red, S. thermophilus green and their combination in blue. Milk treated at 99 °C (LT) is represented with a full line, while milk treated at 105 °C (HT) is represented with a dotted line. Right: loading plot. Arrows link the loading plot point to the interval name when excessive clustering is present.