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Detailed analysis of the C-terminal 51–81 region of Rv2654c compared to p38-55 peptide. The number of spot forming cells per million PBMC (SFC/106) are presented from n = 19 MTB sensitized individuals. The cut-off for positive response was 20 SFC/106 above nil (dotted line). Significance was calculated using Mann–Whitney U test. **p < 0.005. Black lines represent the median SFC/106 values on both panels.
