“…Some or all genes for threonine biosynthesis have been cloned from several Gram-positive bacteria, several species of Corynebacterium (Mateos et al, 1987a, b ;Kalinowski et al, 1991 ;Follettie et al, 1993 ;Malumbres et al, 1994 ;), several species of Mycobacterium (Cirillo et al, 1994), Lactobacillus lactis (Le et al, 1996), Bacillus spp. (Bondaryk & 1985 ; Parsot & Cohen, 1988 ;Malumbres et al, 1995), Pseudomonas aeruginosa (Clepet et al, 1992), Thermus flavus (Nishiyama et al, 1995) and enterobacteria (Cohen & Saint-Girons, 1987 ;Omori et al, 1993). Organization of threonine biosynthesis genes in Haemophilus influenzae became known upon completion of its genome sequencing (Fleischmann et al, 1995).…”