Fig. 2

Sputum liquefaction degree after the proposed enzymatic method and the traditional reducing procedure. Transmittance averages (A) and standard deviations (B) obtained from 3 absorbance measures at 800 nm of sputum samples (n = 29) processed with PBS (black), the traditional DTT procedure (blue) and the proposed enzymatic method (red). Horizontal bars represent the median and p-values were yielded by a Kruskall-Wallis test