Table 1 Crude yield of scFvFc 2G8 produced HR. Concentration of functional antibody produced in the extracts of roots, sampled at day 14 of culture cycle, was calculated by quantitative ELISA and values indicate average yield ± standard error (SE, n = 3). The yields are reported as Ab μg for g of fresh weight (FW) or Ab percentage in total soluble proteins (TSP) extracts of HR.