... de Salamanca, Edi®cio Departamental, Avda, Salamanca,Spain;2Centro Hispano-Luso de Investigaciones Agrarias, Universidad de Salamanca, Edi®ci o Departamental, Avda, Salamanca,Spain The Phycomyces ... of the function and organization of the enzyme complex, the analysis of mutant a lleles of the ge nesinvolved in the biosynthetic pathway c an certainly providevaluable information. In this ... Complementation analysisTo characterize genetically the mutant strain A4 86, a complementation analysis was performed by making hetero-karyons between this mutant strain and representativestrains altered...