Thionins are small plant proteins which are toxic to animal cells. They seem to exert their toxic effect at the level of the cell membrane. Their precise function is not known. THN3_HORVU MAPSKSIKSVVICVLILGLVLEQVQVEGKSCCKDTLARNCYNTCHFAGGSRPVCAGACRCKIISGPKCPSDYPKLNLLPESGEPDVTQYCTIGCRNSVCDNMDNVFRGQEMKFDMGLCSNACARFCNDGAVIQSVEA Leaf-specific thionin DB4 137 Acidic protein THI1.3