comparative gene prediciton
	•  rosseta (Batzoglou et al., 2000) •  cem (Bafna and Huson, 2000) •  sgp1 (Wiehe et al., 2000) •  twinscan (Korf et al., 2001) •  slam (Patcher et al., 2001) •  doublescan (Meyer and Durbin, 2002) •  sgp2 (Parra et al., 2003)