TABLE 3.

Enzymatic conversion of chitosan to COSs by chitosanases.

Microorganism source	Amount of enzyme (U/ml)	Concentration of chitosan (%)	Reaction time (Min)	Total COSs yield (%)	Major products	References
A. fumigatus CJ22-326	30	2	480	97.3	(GlcN)2 to (GlcN)6	Zhou J. L. et al. (2020)
P. barengoltzii	5	5	240	79.3	(GlcN)2 to (GlcN)4	Jiang et al. (2021)
B. amyloliquefaciens	3	3	180	86.9	(GlcN)2 to (GlcN)6	Qin et al. (2018b)
B. atrophaeus BSS	20	4	40	80.6	(GlcN)2 to (GlcN)6	Cui et al. (2021)
B. mojavensis SY1	9	4	15	92.3	(GlcN)2 to (GlcN)6	This study