Resumen
The invention relates to promoters of the genes glutamate desydrogenase, .beta.-acetylhexosaminidase and .gamma.-actine and their use in systems of expression, secretion and anti-sens of filamentary funghi. The invention also relates to the use of the promoters of the genes which code: (I) glutamate desydrogenase NADP depending (EC.1.4.1.4) of Penicillium chrysogenum, (II) .gamma.-N-actylhexosaminidase (EC.3.2.1.52) of Penicillium chrysogenum and (III) .gamma.-actine of Penicillium chrysogenum and Acrimonium chrysogenum, which can be used for the construction of potent vectors of expression and secretion useful both for P. chrysogenum and for A. chrysogenum and related species. Said promoters can also be used for blocking the genic expression through anti-sens construction. Under the control of the above mentioned promoters, it is possible to conduct the expression of other genes in filamentary fungi, thereby increasing the production of antibiotics and/or proteins inherent to the same.