FIGURE 4.
(A–E) Relative mRNA expression levels of HSP27, HSP40, HSP60, HSP70, and HSP90 in broiler hearts at pre-ACS and ACS. a,b,cMeans with different superscripts represent significant differences between groups at same time (P < 0.05). x,yMeans with different superscripts represent significant differences between pre-ACS and ACS in same group (P < 0.05), the same or no superscripts represent no significant differences (P > 0.05).