The amino-acid sequences of two candidate sdAbs that were tested in in vitro assays (Fig. 1), showing the relative positions of the three complementarity determining regions (CDR). The dots indicate amino acids in the sequence of AgThG611 that are identical to those in AgThG11. The dashes indicate gaps in the alignment. The positions of synthetic linker sequences (lower case letters), c-myc, and 6-His tags are also indicated. The linker and tag sequences were excluded from the form of the AgThG11 protein that was expressed in maize.