Fig 1: IGF-1 concentration and total protein contents in bear serum.(A) IGF-1 levels in bear serum were quantified by ELISA assay. (B) Total protein levels in bear serum were quantified. (C) IGF-1 levels were corrected with the total protein content in bear serum. The experimental group for each season was consisted of identical bear individuals. N = 7 in each group. Data are expressed as mean ± standard errors. Significant differences: #, p < 0.05.