Contraction in length of the fibers when exposed to relative humidity (RH) for 2 h. No contraction was detected at relative humidity < 70% for both the constructs. At 95% the NT2RepCT dissolved, but the NT2RepY-FCT did not. Asterisks above the histograms indicate significant differences (p value <0.05). Black color is used for NT2RepCT fibers and green color for NT2RepY-FCT fibers. The error bars are the standard deviation of the data set.