GJA8 and ulcer disease: The ulcer and positive control groups have total protein values of 281.83 ± 15.30 μg mL−1 and 450.25 ± 31.52 μg mL−1 respectively, whereas the CA‐E‐, CA‐B‐, and CA‐Aq‐treated groups showed total protein values of 334.17 ± 70.09 μg mL−1, 395.42 ± 39.11 μg mL−1, and 377.40 ± 13.33 μg mL−1 respectively.