Fig. 3. hsp70 expression of the control active stage (I) and an active stage subjected to a heat shock (hs) at 37°C for 90 min: (A) hsp70 isoform 1, (B) hsp70 isoform 2 and (C) hsp70 isoform 3. The mRNA copy number was calculated based on the beta-actin housekeeping gene as described in the Materials and methods. Results are presented as means ± S.D.