NOVELTY - An isolated polynucleotide derived from a fungal source, where the polynucleotide comprises a nucleotide sequence encoding an enzyme having beta -glucosidase (BGL) activity, is new.    USE - The isolated polynucleotide and methods are useful for producing an expression construct; a vector; a purified BGL5 polypeptide with the biological activity of the BGL; for producing the enzyme having BGL activity; producing a purified enzyme; producing a detergent composition; expressing a heterologous polypeptide; and producing ethanol (all claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are: (1) an isolated polynucleotide selected from (a) a nucleic acid sequence which encodes or is complementary to a sequence which encodes a BGL5 polypeptide having at least 85% sequence identity to the amino acid sequence of fully defined 484 amino acids (SEQ ID NO: 2), given in the specification; (b) a nucleic acid sequence which encodes or is complementary to the sequence which encodes the BGL5 polypeptide having at least 90% sequence identity to the amino acid sequence of SEQ ID NO: 2; (c) a nucleic acid sequence which encodes or is complementary to the sequence which encodes the BGL5 polypeptide having at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 2; (d) a nucleic acid sequence which encodes or is complementary to the sequence which encodes the BGL5 polypeptide having the amino acid sequence of SEQ ID NO: 2; (e) a nucleic acid sequence which encodes or is complementary to the sequence which encodes the BGL5 polypeptide having at least 95% sequence identity to the amino acid sequence presented as SEQ ID NO: 2; (f) a nucleic acid sequence which encodes or is complementary to the sequence which encodes the BGL5 polypeptide having the amino acid sequence presented as SEQ ID NO: 2; (g) a nucleic acid sequence of fully defined 1455 bp (SEQ ID NO: 3), or the complement thereof; and (h) a nucleic acid sequence that hybridizes, under high stringency conditions to the sequence of SEQ ID NO: 3, or the complement or a fragment, where the isolated polynucleotide encodes the polypeptide having the biological activity of the BGL; (2) an expression construct including a polynucleotide sequence (a) having at least 85% sequence identity to the amino acid sequence presented of SEQ ID NO: 2, or (b) being capable of hybridizing to a probe derived from the nucleotide sequence of SEQ ID NO: 2 under conditions of intermediate to high stringency, or (iii) being complementary to a nucleotide sequence having at least 85% sequence identity to the amino acid sequence of SEQ ID NO: 2; (3) a vector including the expression construct, and/or comprising the isolated polynucleotide linked to control sequences recognized by a host cell transformed with the vector; (4) a host cell transformed with the vector; (5) a recombinant host cell comprising the polynucleotide; (6) a substantially purified BGL5 polypeptide with the biological activity of the BGL, comprises a sequence selected from (a) the amino acid sequence having at least 85% sequence identity to the amino acid sequence of SEQ ID NO: 2; (b) the amino acid sequence having at least 90% sequence identity to the amino acid sequence of SEQ ID NO: 2; (c) the amino acid sequence having at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 2; (d) the amino acid sequence of SEQ ID NO: 2; (e) the amino acid sequence having at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 2; (f) the amino acid sequence of SEQ ID NO: 2; and (g) a substantially purified biologically active fragment of the amino acid sequence of SEQ ID NO: 2; (7) a method of producing the enzyme having BGL activity, comprises: (a) transforming the host cell with the expression vector comprising the polynucleotide; (b) cultivating the transformed host cell under condition suitable for the host cell to produce the BGL; and (c) recovering the BGL; (8) a purified enzyme having BGL activity prepared by the latter method; (9) a recombinant host cell comprising a deletion or insertion or other alteration in the bgl5 gene which inactivates the gene and prevents BGL5 polypeptide production; (10) an antisense oligonucleotide complementary to a messenger RNA that encodes the BGL5 polypeptide having the sequence of SEQ ID NO: 2, where upon exposure to a BGL-producing host cell, the oligonucleotide decreases or inhibits the production of BGL by the host cell; #a detergent composition comprising the polypeptide selected from (a) the amino acid sequence having at least 85% sequence identity to the amino acid sequence of SEQ ID NO: 2; (b) the amino acid sequence having at least 90% sequence identity to the amino acid sequence of SEQ ID NO: 2; (c) the amino acid sequence having at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 2; (d) the amino acid sequence of SEQ ID NO: 2; (e) the amino acid sequence having at least 95% sequence identity to the amino acid sequence of SEQ ID NO: 2; (f) the amino acid sequence of SEQ ID NO: 2; and (g) a substantially purified biologically active fragment of the amino acid sequence of SEQ ID NO: 2; (11) a method of expressing a heterologous polypeptide having BGL activity in an Aspergillus species, comprises: (a) providing a host Aspergillus with the expression vector comprising the polynucleotide encoding a signal sequence linked to the polynucleotide encoding the heterologous BGL, thus encoding a chimeric polypeptide; (b) cultivating the host Aspergillus under conditions suitable for the Aspergillus to produce the chimeric polypeptide, where the chimeric polypeptide is produced; and (12) a method of producing ethanol comprises: (a) contacting a biomass composition with an enzymatic composition comprising BGL4 to yield a sugar solution; (b) adding to the sugar solution a fermentative microorganism; and (c) culturing the fermentative microorganism under conditions sufficient to produce ethanol, where the biomass composition may be optionally pretreated.