The second annual meeting will be organized as a joint event of two COST Actions: EpiChemBio (CM1406) and MuTaLig COST (CA15135). The purpose of this appointment is to stimulate collaborations among the participants in the research themes belonging to both COST Actions. The location selected for this first meeting is the beautiful city of Porto, elected as Best European Destination 2017. The conference will be held at the University of Porto, in the two and half days: Sept 22nd to Sept 24th 2017. The local organizer is the MuTaLig Vice Chair and MC Member for Portugal Prof. Fernanda Borges.