. 2016 Sep 23;5(4):33. doi: 10.3390/antibiotics5040033

Table 1.

Muropeptides of S. carnosus TM300 analyzed by UPLC-MS. Each muropeptide contains one to five stem-peptides and each consists of the three to five amino acids l-Ala-d-iGln-l-Lys(-d-Ala)(-d-Ala). The interpeptide bridges are built of Gly molecules. The sum of all Gly residues present in each muropeptide is given. Muropeptide peaks 4, 7 and 10 (highlighted in bold) are strongly elevated by hlyD-ftsE-ftsX overexpression. Muropeptide peaks 3, 6 and 9 (highlighted in italics) are strongly elevated by high glucose and fructose concentrations.

Peak	Retention Time (min)	M + H⁺ (Da)	Proposed Molecular Formula	Lengths of the Stem Peptides	Inter-Peptide Bridges
Peak	Retention Time (min)	M + H⁺ (Da)	Proposed Molecular Formula	Lengths of the Stem Peptides	Gly
1	7.5	1111.5192	C₄₃H₇₅N₁₂O₂₂⁺	Tri	5
2	8.6	1036.4937	C₄₀H₇₀N₁₃O₁₉⁺	Tetra w/o GlcNAc	6
		1093.5164	C₄₂H₇₃N₁₄O₂₀⁺		7
		1150.5417	C₄₄H₇₆N₁₅O₂₁⁺		8
		1207.5699	C₄₆H₇₉N₁₆O₂₂⁺		9
		1239.5699	C₄₈H₈₃N₁₄O₂₄⁺	Tetra	6
		1296.5939	C₅₀H₈₆N₁₅O₂₅⁺		7
		1353.6135	C₅₂H₈₉N₁₆O₂₆⁺		8
		1410.6370	C₅₄H₉₂N₁₇O₂₇⁺		9
3	10.2	979.4691	C₃₈H₆₇N₁₂O₁₈⁺	Tetra w/o GlcNAc	5
3	10.2	1182.5502	C₄₆H₈₀N₁₃O₂₃⁺	Tetra	5
4	11.1	1253.5856	C₄₉H₈₅N₁₄O₂₄⁺	Penta	5
5	19.2	2275.0595	C₈₉H₁₅₂N₂₅O₄₄⁺	Tri-Tetra	10
6	21.5	2346.0815	C₉₂H₁₅₇N₂₆O₄₅⁺	Tetra₂	10
7	21.9	2417.1143	C₉₅H₁₆₂N₂₇O₄₆⁺	Penta-Tetra	10
8	25.4	3438.5927	C₁₃₅H₂₂₉N₃₈O₆₆⁺	Tri-Tetra₂	15
9	27.2	3509.6465	C₁₃₈H₂₃₄N₃₉O₆₇⁺	Tetra₃	15
10	27.5	3580.6553	C₁₄₁H₂₃₉N₄₀O₆₈⁺	Penta-Tetra₂	15
11	29.1	4602.0920	C₁₈₁H₃₀₆N₅₁O₈₈⁺	Tri-Tetra₃	20
12	31.6	5765.6142	C₂₂₇H₃₈₃N₆₄O₁₁₀⁺	Tri-Tetra₄	25

Note: w/o—without.