Fig. 1 (abstract P-048).

Process performance of basal medium (black) and feed-spiked (red) bioreactor batch cultures: a cell concentrations and viability, b viable cumulative cell days and specific growth rate, and c antibody concentrations and cell-specific productivity. Error bars indicate standard deviation from three independent experiments. The black arrows on Day 4 indicate the beginning of decreasing cell-specific productivities and lower cell-specific growth rates in basal medium cultures