Abstract: The present invention provides methods and compositions for rapidly producing multivalent recombinant vaccines using filamentous fungal heterokaryons. The present invention relies on the use of filamentous fungal heterokaryons that are generated from combinations of two or more parent strains into which recombinant DNA molecules encoding variants of antigens derived from pathogenic organisms have been introduced. The resulting vaccines are multivalent.

Abstract: The present invention provides methods and compositions for rapidly producing multivalent recombinant vaccines using filamentous fungal heterokaryons. The present invention relies on the use of filamentous fungal heterokaryons that are generated from combinations of two or more parent strains into which recombinant DNA molecules encoding variants of antigens derived from pathogenic organisms have been introduced. The resulting vaccines are multivalent.

Abstract: Methods and compositions are provided for the efficient in vivo diversification of gene-products in filamentous fungi, starting from (but not limited to) two or more copies of a single gene constituent. The diversification involve use of the Repeat-Induced Point mutation (RIP) process in N. crassa, and other fungi that have analogous mutational processes. The invention takes advantage of the induction of G:C to A:T transition mutations specific to duplicated DNA sequences during the premeiotic dikaryon phase of the life cycle of the fungus. The methods and compositions of the invention can be utilized to generate diversity in target genes, and are proposed for the purpose of altering and generating novel forms and activities of gene-products thus encoded. Duplicated genes may be introduced into the organism and are present either in tandem, or at separate ectopic locations within the genome of the fungus.

Abstract: Methods and compositions are provided for the efficient in vivo diversification of gene-products in filamentous fungi, starting from (but not limited to) two or more copies of a single gene constituent. The diversification involve use of the Repeat-Induced Point mutation (RIP) process in N. crassa, and other fungi that have analogous mutational processes. The invention takes advantage of the induction of G:C to A:T transition mutations specific to duplicated DNA sequences during the premeiotic dikaryon phase of the life cycle of the fungus. The methods and compositions of the invention can be utilized to generate diversity in target genes, and are proposed for the purpose of altering and generating novel forms and activities of gene-products thus encoded. Duplicated genes may be introduced into the organism and are present either in tandem, or at separate ectopic locations within the genome of the fungus.