Figure 4.

Schematic representation of the recombinant collagen constructs introduced into a plant host system and the estimated yield. The blue helix represents the designed recombinant collagen helix block, the N- and C- propeptide is represented by green and orange rectangles. The N- and C- telopeptide is represented with grey and black rectangles. The NTD and CTD are represented as in Figure 1 . The foldon sequence is represented by a purple hairpin shape and a green arrow represents the ER-retention signal. GluB1, rice glutelin B1 promoter; α-amy, barley α -amylase fusion promoter 46 /4-6; BAAAS, Barley α -amylase signal sequence; Ubi-I, maize ubiquitin promoter and first intron; SS, Arabidopsis basic chitinase signal sequence; ϵ, the 5'UTR of Cocksfoot mottle virus; Pg1b, maize embryo specific globulin-1 promoter; PGNpr2, embryo-specific maize globulin-1 promoter; L3, L3 promoter.