Supplemental material

Files in this Data Supplement:

• Fig. S3 - The phylogenetic tree with bootstrap value. PDF document, 406K.
• Data S1 - Full alignment of prohead proteases from dsDNA bacteriophages that are clan SH proteases. Word document, 152K.
• Data S2 - Full alignment of prohead proteases from ds DNA bacteriophages that are clan SK proteases. Word document, 122K.