Matching catalytic activity to developmental function: Tolloid
... used an in vitro assay system that was previously developed to
characterize Sog cleavage by Tld (Marqués et al., 1997;
Shimmi and O’Connor, 2003). In these studies, it was
determined that, in the presence of Dpp, Tld processes Sog at
one minor (II) and three major sites (I, III and IV, Fig. 1C).