1 Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil. Electronic address: henning@iq.usp.br.
2 Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil; Instituto Nanocell, Divinópolis, MG, Brazil. Electronic address: rrresende@institutonanocell.org.br.