Note
Ecteinascidin production for ascidians fed at the two highest cell concentrations showed a tenfold increase over 31 days, thus indicating that in vitro culture is one possible method of supplying the antitumor compound. Overall, this study suggests that a mixed diet of C. gracilis and I. galbana at a concentration of 160,000 cells ml-1 is a good feeding regime for the in vitro culture of E. turbinata to supply ecteinascidins.