Acknowledgments The work was supported by grants from the National
Science Center, Poland (grant no. 2011/03/B/NZ1/00592) and by
European Funds Portal Innovative Economy BCentre of medicinal product
biotechnology. Package of innovative biopharmaceuticals for human
and animal therapy and prophylactics^ (POIG.01.01.02.-14-007/08-06).
We thank Dr J. Hansen for his critical reading of the manuscript