Thermostable and Alkalistable Xylanases Produced by the Thermophilic Bacterium Anoxybacillus flavithermus TWXYL3

Table 1

General characteristics of A. flavithermus TWXYL3, A. flavithermus DSM 2641, Anoxybacillus ayderensis ABO4, and Anoxybacillus kestanbolensis K4 [33].

	TWXYL3	DSM 2641	ABO4	K4
Morphology	Bacilli	Bacilli	Bacilli	Bacilli
Gram reaction	Gram positive	Gram positive	Gram positive	Gram positive
Optimal growth temperature (°C)	65	60–65	50–55	50–55
Temperature growth range (°C)	35–75	30–72	30–70	40–70
Optimal growth pH	7.0	7.0	7.5–8.5	7.5–8.5
pH growth range	6.0–10.0	5.5–9.0	6.0–11.0	6.0–10.5
Salt tolerance	3% NaCl	2.5%	2.5%	4.0%
Aerotolerance	Facultative	Facultative	Facultative	Facultative
Motility	+	+	+	+
Spore formation	+	+	+	+
Biofilm formation	+	ND	ND	ND
Hydrolysis of
birchwood xylan	+	ND	ND	ND
beechwood xylan	+	ND	ND	ND
oat Spelt xylan	+	ND	ND	ND
dairy waste	+	ND	ND	ND
Growth on		ND
cellulose	+	ND	ND	ND
glucose	+	ND	+	+
L-arabinose	+	+	+	+
D-fructose	+	ND	+	+
D-xylose	+	−	+	+
D-galactose	+	ND
D-mannose	+	+	+	+
D-Lactose	+	−	−	−
starch	+	ND	+	+
sucrose	+	ND	+	+