A phylogenetic tree was drawn to study the genetic distance
of CsCath L using the neighbour-joining method
and is presented in a radiation view (Fig. 2). Phylogenetic
analysis showed that CsCath L exhibits a strong
relationship with other cathepsin L from various organisms.
The CsCath L sequence is clustered with other
teleosts cathepsin L. Moreover, to find the evolutionary
position of the CsCath L, it was compared with the
other sequences of cathepsin B, D, E and G.