In the sentence extracted from biomedical literature, identify all the disease entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="disease"> to denote a disease.

### Input Text: Interestingly , BRCA2 also includes a motif similar to the granin consensus at the C terminus of the protein .
### Output Text:
Interestingly , BRCA2 also includes a motif similar to the granin consensus at the C terminus of the protein . 