The percentage of amino acid length 2 (p < 0.003), 5(p < 0.047), 16 (p < 0.0011), 18 (p < 0.0012), 19 (p < 0.013), 25 (p < 0.034), 26 (p < 0.033) were significantly higher in CD4+ group compared to sarcoidosis tissue group. Here, CD4 is linked to sarcoidosis.