Rheological data with strain and angular frequency sweeps for 2 gl -1 NFC and 42 % ( w / w ) protein .     a ) Representative stress - strain curves . b ) Young´s moduli , e ) yield strength , d ) Ultimate tensile strength , e ) strain - to - failure . f ) work - to - fracture and g ) slope after yield point . All data is presented with standard deviation . Figure S7 . Representative stress - strain curves for HFB - dCBM-48 ( solid blue line ) , dCBM-48 ( dashed blue line ) and unmodified NFC film ( solid black line ) from the cyclic tensile measurements . The results show that deformations after the yield point were not recovered after stress release and therefore the deformations were plastic but as the Young 's modulus did not change , it is indicated that displaced interactions could reform after plastic deformation .