Nucleic acid sequences encoding CEL II endonuclease

1. An isolated nucleic acid encoding a CEL II polypeptide comprising SEQ ID NO: 2 or SEQ ID NO: 4.

2. The nucleic acid of claim 1 , wherein said nucleic acid comprises:

(a) a nucleic acid comprising SEQ ID NO: 1 or SEQ ID NO: 3; or

(b) a nucleic acid that hybridizes under stringent conditions of 5000 Formamide with 5×Denhardt's solution, 0.5% SDS and 1×SSPE at 42° C. to a nucleic acid comprising SEQ ID NO: 1 or SEQ ID NO: 3.

3. A vector comprising the nucleic acid of claim 1 .

4. A vector comprising the nucleic acid of claim 2 .

5. An isolated host cell comprising the nucleic acid of claim 1 .

6. An isolated host cell comprising the nucleic acid of claim 2 .

7. An isolated host cell comprising the vector of claim 3 .

8. An isolated host cell comprising the vector of claim 4 .