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Changes in HSP60, HSP70, and HSP90 protein expression levels in spleens of laying hens in CC and FC groups before transportation (BT), immediately after transportation (0 h), and at 48 h after the transportation (48 h). Lowercase letters “a, b, c” indicate significant differences (P < 0.05), and the same or nonstandard means no significant differences (P > 0.05). Abbreviations: CC, conventional cage; FC, furnished cage; HSP, heat shock protein.
