FIGURE 6.

Unusual peptidyl form lipoprotein from M. fermentans. SDS-PAGE pattern of lipoproteins from M. fermentans cells (A), MS spectrum (B, inset), and MS/MS spectrum (B) from a fraction containing in-gel-digested MBIO_0319 from M. fermentans. C, the elucidated structure of MBIO_0319. The y-series ions, y* ions that have lost ammonium from y ions, and other major product ions are highlighted. The asterisk indicates a contaminated ion derived from the matrix. D, putative cleavage sites of four M. fermentans lipoproteins. The lipidated cysteine residue is marked with an asterisk.