. 2018 Jul 3;9:1375. doi: 10.3389/fmicb.2018.01375

Table 2.

The 31 kinds of carbon substrates loaded on the first and second principal component in analysis of BIOLOG ECO microplates data.

Chemical guild	Plate number	Substrates	Chemical formula	PC1	PC2
Miscellaneous	B1	Pyruvic acid methyl ester	C₄H₆O₃	0.2133	0.1968
	G2	Glucose-1-phosphate	C₆H₁₃O₉P	0.0033	0.3322
	H2	D,L-α-Glycerol phosphate	C₃H₉O₆P	–0.2420	0.1032
Polymers	C1	Tween 40	–	0.2398	–0.0996
	D1	Tween 80	–	0.0500	–0.1901
	E1	α-Cyclodextrin	C₃₆H₆₀O₃₀	0.1103	–0.1781
	F1	Glycogen	(C₆H₁₀O₅)_n	0.2141	0.0407
Carbohydrates	G1	D-Cellobiose	C₁₂H₁₂O₁₁	0.2292	0.0885
	H1	α-D-Lactose	C₁₂H₁₂O₁₁	0.2426	0.1402
	A2	Methyl-D-glucoside	C₇H₁₄O₆	0.2489	0.0717
	B2	D-Xylose	C₅H₁₀O₅	0.1942	–0.1073
	C2	i-Erythritol	C₄H₁₀O₄	0.2296	–0.0517
	D2	D-Mannitol	C₆H₁₄O₆	0.1226	–0.1551
	E2	N-Acetyl-D-glucosamine	C₈H₁₅NO₆	0.0929	0.2089
Carboxylic acids	F2	D-Glucosaminic acid	C₆H₁₃NO₆	0.1849	0.1302
	A3	D-Galactonic acid latone	C₆H₁₀O₆	0.2058	0.1997
	B3	D-Galacturonic acid	C₆H₁₀O₇	0.1217	0.1913
	C3	2-Hydroxy benzoic acid	C₇H₆O₃	–0.1194	–0.2752
	D3	4-Hydroxy benzoic acid	C₇H₆O₃	0.0291	0.3345
	E3	γ-Hydroxy butyric acid	C₄H₈O₃	–0.1384	0.2710
	F3	Itaconic acid	C₅H₆O₄	0.1027	–0.1428
	G3	α-Keto butyric acid	C₄H₆O₃	0.0846	0.2812
	H3	D-Malic acid	C₄H₆O₅	0.1845	0.1137
Amino acids	A4	L-Arginine	C₄H₁₄N₄O₂	–0.2298	0.1084
	B4	L-Asparagine	C₄H₈N₂O₃	0.1433	–0.0043
	C4	L-Phenylalanine	C₉H₁₁NO₂	–0.0231	–0.2425
	D4	L-Serine	C₃H₇NO₃	0.2494	0.0564
	E4	L-Threonine	C₄H₉NO₃	–0.2045	0.1562
	F4	Glycyl-L-glutamic acid	C₇H₁₂N₂O₅	0.0982	–0.2394
Amines/amides	G4	Phenylethylamine	C₈H₁₁N	–0.2682	–0.0264
	H4	Putrescine	C₄H₁₂N₂	–0.2316	0.1527