Positive test controls include: Mouse brain. Immunogen sequence: VTEFSPKLRQ VMLNEMLLLD IHTHEAGTGQ AGERPPSDLI SRVRGYLEMR LPDIPLRQVI AEECVAFMLN WRENEYLTLQ VPAFLLQSNP YVKLGQLLAA TCKELPGPKE SRRTAKDLWE VVVQICSVSS QHKRGNDGRV SLIKQRESTL GIMYRSELLS FIKKLREPLV LT