An expression construct comprising two or more inducible promoters, wherein at least one inducible promoter is a propionate-inducible promoter and at least one other inducible promoter is an L-arabinose-inducible promoter, wherein the expression construct comprises a nucleotide sequence having at least 87% identity to nucleotides 2818 through 3259 of SEQ ID NO:15 and a nucleotide sequence having at least 90% identity to nucleotides 4937 through 5304 of SEQ ID NO:15; and wherein the expression construct comprises a nucleotide sequence selected from the group consisting of: (a) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (b) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (c) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of SEQ ID NO:15; (d) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of SEQ ID NO:15; (e) a nucleotide sequence having at least 80% identity to at least 3500 contiguous bases of SEQ ID NO:15; (f) a nucleotide sequence having at least 80% identity to at least 4000 contiguous bases of SEQ ID NO:15; (g) a nucleotide sequence having at least 80% identity to at least 5000 contiguous bases of SEQ ID NO:15. wherein at least one inducible promoter is a propionate-inducible promoter and at least one other inducible promoter is an L-arabinose-inducible promoter, wherein the expression construct comprises a nucleotide sequence having at least 87% identity to nucleotides 2818 through 3259 of SEQ ID NO:15 and a nucleotide sequence having at least 90% identity to nucleotides 4937 through 5304 of SEQ ID NO:15; and wherein the expression construct comprises a nucleotide sequence selected from the group consisting of: (a) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (b) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (c) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of SEQ ID NO:15; (d) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of SEQ ID NO:15; (e) a nucleotide sequence having at least 80% identity to at least 3500 contiguous bases of SEQ ID NO:15; (f) a nucleotide sequence having at least 80% identity to at least 4000 contiguous bases of SEQ ID NO:15; (g) a nucleotide sequence having at least 80% identity to at least 5000 contiguous bases of SEQ ID NO:15. (a) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (b) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of nucleotides 1833 through 5304 of SEQ ID NO:15; (c) a nucleotide sequence having at least 80% identity to at least 3000 contiguous bases of SEQ ID NO:15; (d) a nucleotide sequence having at least 80% identity to at least 3250 contiguous bases of SEQ ID NO:15; (e) a nucleotide sequence having at least 80% identity to at least 3500 contiguous bases of SEQ ID NO:15; (f) a nucleotide sequence having at least 80% identity to at least 4000 contiguous bases of SEQ ID NO:15; (g) a nucleotide sequence having at least 80% identity to at least 5000 contiguous bases of SEQ ID NO:15.