@article{zhang2013enhancing,
  author = "Z. Zhang and Y. Zheng and M. Petukh and A. Pegg and Y. Ikeguchi and E. Alexov",
  title = "Enhancing human spermine synthase activity by engineered mutations",
  year = 2013,
  journal = "PLoS Comput Biol",
  publisher = "Public Library of Science",
  volume = 9,
  number = 2,
  pages = "e1002924"
}