3032660 MELI Met-enkephalin-like immunoreactivity 12 1255975 MLI met-enkephalin-like immunoreactivity 8 3032652 ME-LI methionine enkephalin-like immunoreactivity 6 3032150 ME-i.r met-enkephalin-like immunoreactivity 3 1858222 ENK-ir met-enkephalin-like immunoreactivity 1 1888700 m-ENK-LI met-enkephalin-like immunoreactivity 1