L-seryl-L-threonine + H2O <=> L-threonine + L-serine
l-seryl-l-threonine + h2o <=> l-threonine + l-serine
L-seryl-L-threonine + H2O <=> L-threonine + L-serine
l-seryl-l-threonine + h2o <=> l-threonine + l-serine