** Authors **

Salvador Capella-Gutierrez.
  Comparative Genomics Group. Bioinformatics and Genomics Department.
  Centre for Genomic Regulation. Barcelona, Spain.
  e-mail: scapella _at_ crg.es

Toni Gabaldón.
  Comparative Genomics Group. Bioinformatics and Genomics Department.
  Centre for Genomic Regulation. Barcelona, Spain.
  e-mail: tgabaldon _at_ crg.es

** Authors (until trimAl v1.1) **

Jose Ma. Silla-Martínez.
  e-mail: josilma1 _at_ gmail.com
