A laser apparatus for irradiating an object to be irradiated with a laser beam emitted from a laser source is disclosed. In particular, the present invention relates to the purification, molecular cloning, recombinant expression of the truncated HGF variants and related pharmaceutical compositions. The apparatus is attachable to a floor underside with the protective chamber thereof surrounding a curtain wall anchor assembly attached to the floor underside for fire protection thereof. The extension of this final part of the suction circuit also forms a trap for the recovery of further drops of paint carried by the air, and this circuit also has lower walls inclined downwards towards the said bottom tank which collects the recovered paint by gravity. In this way, the float valve can guide itself into the correct position without the need for additional guiding components. In preferred embodiments, the subject genes and toxins are used to control Western corn rootworm.