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Table 2 Composition of rhamnolipid congeners synthesised by Marinobacter sp. MCTG107b

From: Biosynthesis of rhamnolipid by a Marinobacter species expands the paradigm of biosurfactant synthesis to a new genus of the marine microflora

RT min m/z value Compound Mw (Da) Molecular form Relative %
Mono-rhamnolipid congeners
 14.8 387.22 Rha-C14:2 386.48 C20H34O7 3.18
 21.5 533.46 Rha-C10-C12/Rha-C12-C10 532.71 C28H52O9 0.22
 24.2 503.47 Rha-C10-C10:1 502.64 C26H46O9 0.27
 26.9 561.52 Rha-C12-C12/Rha-C10-C14 560.76 C30H56O9 0.94
 Subtotal 4.61
Di-rhamnolipid congeners
 4.6 453.27 Rha-Rha-C8 452.49 C20H36O11 1.95
 12.7 480.39 Rha-Rha-C10 480.55 C22H40O11 5.13
 22.1 537.45 Rha-Rha-C14 536.65 C26H48O11 0.21
 31.0 649.71 Rha-Rha-C10-C10:1/Rha-Rha-C10:1-C10 648.74 C32H56O13 2.85
 32.1 651.73 Rha-Rha-C10-C10 650.79 C34H58O13 52.45
 32.8 677.77 Rha-Rha-C10-C12:1 676.83 C33H60O13 1.06
 33.0 665.77 Rha-Rha-C10-C10-CH3 664.82 C42H60O13 23.07
 34.5 803.54 Decenoyl-Rha-Rha-C10-C10:1 801.01 C35H72O11 0.40
 35.1 679.78 Rha-Rha-C10-C12/Rha-Rha-C12-C10 678.84 C35H64O13 5.01
 37.2 693.90 Rha-Rha-C10-C12-CH3/Rha-Rha-C12-C10-CH3 692.80 C35H64O13 3.26
 Subtotal 95.39
  1. Rhamnolipid congeners were identified via HPLC–MS in SPE purified extracts from cell-free culture supernatant samples obtained after 96 h growth in a bioreactor