Fig. 1
From: Block-based characterization of protease specificity from substrate sequence profile
A schematic diagram of construction of different blocks. The blocks of successive amino acids are denoted from N-terminal to C-terminal, so that block B1 represents the P1 site, block B1’ represents the P1’ site, block B2 represents the successive sites of P2 and P1, and block B2’ represents the successive sites of P1’ and P2’ and so on. For example, block B2 LeuLys implies Leu at the site P2 and Lys at the site P1, and block B2’ PheArg implies Phe at the site P1’ and Arg at the site P2’. Other blocks may be deduced similarly