SPR measurement of Koff (a, b) and ELISPOT measurements of IFN-γ responses by pESAT-stimulated draining lymph node cells from immunized mice (c), for peptides unheated or heated at 45°C for 7 days. ESAT-Q11 raised antibodies with similar Koff values before and after heating, both as a dry powder and when formulated as nanofibers in buffer (a, representative SPR traces; b, Koff calculated). n=5 (one died from anesthesia in the 45°C dry group), n.s. = p > 0.05 by ANOVA with Tukey post-hoc tests.