OVMC were isolated by artificial digestion with the pepsin and
sedimentation method,as has previously described elsewhere (Pinlaor
et al., 2013). 0.33 or 0.40 kg of pla-som from each experimental groups
1 and 2, respectively, was mixed with 0.25% pepsin–1.5% HCl in 0.85%
NaCl solution and then homogenized using a blender.