@article{oai:ir.kagoshima-u.ac.jp:00012757,
 author = {SAKATA, Taizo and UEDA, Kazuaki and KAKIMOTO, Daiichi},
 journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University},
 month = {2016-10-31},
 note = {Extracellular ptotease(s) of a marine Pseudomonas sp. I-6 was produced dependent of polypeptone
concentration of the suspending medium but independent of yeast extract in the presence
of polypeptone and artificial sea water (ASW).
In a basal suspension medium containing polypeptone (0.5%), yeast extract (0.1%) and
NaCl (3.0%), protease formation of marine isolates did not occur during 6 hr incubation.
The addition of Ca^++ ion to the basal medium stimulated protease formation but Mg^++ ion
did not replace Ca^++ ion.
In the experiment of washed cell suspensions, K^+ ion was necessary for protease formation
of both marine isolates and Bacillus subtilis. The effect of K^+ ion was almost identical with
that of yeast extract on protease formation. On the other hand, the supplement of Ca^++ ion
was indispensable to marine isolates but not to B. subtilis except as a trace ion contaminant.},
 pages = {63--69},
 title = {Studies on the Proteases of Marine Bacteria II : Effect of Cations on Protease Formation},
 volume = {26},
 year = {}
}