[0] Complex disease models [Error-prone PCR] Difficult [AquaMutant *] Mutate related genes [Transposon] 
Difficult
I n v i v o
N o t r e q u i r e d
R e q u i r e d
M u l t i p l e b u t l i m i t e d
L i m i t e d
D i f f i c u l t