title: Sulphydryl groups and the in vitro enzymatic synthesis of 5-amino-laevulinic acid and porphobilinogen in Rhodopseudomonas spheroides.
authors.affiliation: Instituto de Investigaciones Bioquímicas "Fundación Campomar", Obligado 2490, (28) R, Buenos Aires, Argentina
authors.forename: O C.
authors.initials: OC
authors.lastname: de Barreiro