Patent ID: 8617859

Claim:
A filamentous fungal host cell comprising a heterologous polynucleotide encoding a C4 dicarboxylic acid transporter, wherein the heterologous polynucleotide: (a) encodes a C4 dicarboxylic acid transporter having at least 95% sequence identity to the mature polypeptide of SEQ ID NO: 2; (b) hybridizes under high stringency conditions with the full-length complementary strand of SEQ ID NO: 1 or SEQ ID NO: 3; or (c) has at least 95% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 1 or SEQ ID NO: 3; wherein the host cell secretes increased levels of C4 dicarboxylic acid compared to the host cell without the heterologous polynucleotide encoding the C4 dicarboxylic acid transporter when cultivated under the same conditions.