1 Laboratory of Molecular Biology, Butantan Institute, Avenue Vital Brazil, 1500, CEP 05503-900, São Paulo, SP, Brazil.
2 Institute of Energy and Nuclear Research, IPEN, São Paulo, Brazil.
3 Laboratory of Molecular Biology, Butantan Institute, Avenue Vital Brazil, 1500, CEP 05503-900, São Paulo, SP, Brazil. Electronic address: ana.chudzinski@butantan.gov.br.