The reactions were started by adding 10 mg/mL of Bothrops jararacussu
or Bothrops jararaca venom or3 mg/mL bothropstoxin II (BthTx-II,a
phospholipase A2 from Bothrops jararacussu venom)alone or
preincubated for 30min at 37 C with Combretum leprosum extract
(10–100 mg/mL) or arjunolic acid(0.1–300 μg/mL). Thirty minutes
after starting the reactions,the absorbance of the solutions was
read at 925nm,and data expressed as turbidity decrease and
venom activity(%).