Hoffman P S, Falkinham J O
J Bacteriol. 1981 Nov;148(2):736-8. doi: 10.1128/jb.148.2.736-738.1981.
Tryptophanase was noninducible in swarm cells of Proteus vulgaris despite transport of the inducer tryptophan. Further, cyclic AMP, which stimulated increased levels of tryptophanase in short cells, had no effect on swarm cells.
尽管存在诱导剂色氨酸的转运,但普通变形杆菌的群体细胞中的色氨酸酶是不可诱导的。此外,能刺激短细胞中色氨酸酶水平升高的环磷酸腺苷对群体细胞没有影响。