In yogurts formed at 45.7°C with a 0.5% inoculation rate at gelation time (Figure 6a), gels had finely dispersed protein clusters, whereas this gel became a tortuous, more obviously clustered protein network at LTmax time (Figure 6d) and the end of fermentation (Figure 6g). Yogurt gels made with a 3 or 4% inoculation rate at the gelation time exhibited uniformly distributed protein clusters with some pores (Figure 6b and c). At the time of LTmax, yogurt gels made at a 3 or 4% inoculation rate had changed considerably into more interconnected clusters of aggregated protein particles with larger pores (Figure 6e and f). At the end of fermentation(pH 4.6)(Figure 6 hand i),protein clusters in yogurt gels made with 3 or 4% starter came closer to each other and became compact, and pores became larger (Figures 6h and i).