| L-lactate dehydrogenase (EC 1.1.-.-) | lldD SC1083_1399 | G4A989 | 1 |
| L-lactate dehydrogenase (EC 1.1.-.-) | lldD SSON_3800 | Q3YVX0 | 1 |
| L-lactate dehydrogenase (EC 1.1.2.3) | lldD1 FTT_0303c | Q5NHZ0 | 1 |
| L-lactate dehydrogenase (L-LDH) (EC 1.1.1.27) | ldh SPy_1151 M5005_Spy0873 | P65259 | 1 |
| L-lactate dehydrogenase 2 (L-LDH 2) (EC 1.1.1.27) | ldh2 SAOUHSC_02922 | Q2G1Y5 | 1 |
| L-lactate permease | lldP PP_4735 | Q88DT4 | 1 |
| L-lactate permease | lctP ycgC BSU03060 | P55910 | 1 |
| L-lactate permease | SAOUHSC_00067 | Q2G1N9 | 1 |
| L-ornithine N(5)-monooxygenase (EC 1.14.13.195) (L-ornithine N(5)-hydroxylase) (Ornithine hydroxylase) (L-ornithine N(5)-oxygenase) (Pyoverdin biosynthesis protein A) | pvdA pvd-1 PA2386 | Q51548 | 1 |
| L-rhamnose isomerase (EC 5.3.1.14) | rhaA RUMGNA_01007 | A7B0D1 | 1 |
| L-serine dehydratase | sdaA FTN_0750 | A0Q5X6 | 1 |
| L-serine dehydratase | B195_06340 | M5QM20 | 1 |
| L-serine dehydratase (EC 4.3.1.17) | sdaA Cj1624c | Q0P804 | 1 |
| L-serine dehydratase alpha subunit (EC 4.3.1.17) | sdaA spr0094 | Q8DRJ0 | 1 |
| L-seryl-tRNA(Sec) selenium transferase (EC 2.9.1.1) (Selenocysteine synthase) (Sec synthase) (Selenocysteinyl-tRNA(Sec) synthase) | selA PA4808 | Q9HV01 | 1 |
| L-threonine 3-dehydrogenase (TDH) (EC 1.1.1.103) | tdh FTN_0625 | A0Q5K3 | 1 |
| L-threonine 3-dehydrogenase (TDH) (EC 1.1.1.103) | tdh VSAK1_15137 | A6D3D9 | 1 |
| L-threonine dehydratase (EC 4.3.1.19) (Threonine deaminase) | ilvA VSAK1_24560 | A6D409 | 1 |
| Lactaldehyde dehydrogenase (EC 1.2.1.22) (Aldehyde dehydrogenase A) (Glycolaldehyde dehydrogenase) (EC 1.2.1.21) | aldA ald b1415 JW1412 | P25553 | 1 |
| Lactate utilization protein B | lutB yvfW BSU34040 | O07021 | 1 |
| Lactoferrin-binding protein A | NMH_1457 | E6MXQ0 | 1 |
| Lactoferrin-binding protein A (Iron-regulated outer membrane protein A) | lbpA iroA NMB1540 | Q06379 | 1 |
| Lactonizing lipase | MXAN_5522 | Q1D108 | 1 |
| Lactose phosphotransferase system repressor | lacR spr1067 | Q8DPP7 | 1 |
| Lactoylglutathione lyase (EC 4.4.1.5) (Glyoxalase I) | gloA1 PA3524 | Q9HY85 | 1 |
| Lantibiotic biosynthesis protein | SPCG_0146 | B2IRN1 | 1 |
| Lantibiotic transport ATP-binding protein SrtF | srtF SPy_1085 M5005_Spy0808 | P0C0E3 | 1 |
| Large conductance mechano-sensitive ion channel | mscL spr0915 | Q8DQ03 | 1 |
| Large-conductance mechanosensitive channel | mscL AC1_0185 | B1R7B0 | 1 |
| Large-conductance mechanosensitive channel | mscL SAOUHSC_01345 | P68805 | 1 |
| Late competence protein ComEC | LMRG_02949 | A0A0H3GJ16 | 1 |
| Late embryogenesis abundant protein domain protein | MXAN_6787 | Q1CXG9 | 1 |
| LemA family protein | DET1586 | Q3Z667 | 1 |
| LemA-like protein | Fphi_0447 | B0U036 | 1 |
| LemA-like protein | OOM_0377 | I2AXM1 | 1 |
| LemA-like protein | FTT_0863c | Q5NGH7 | 1 |
| Leu/Ile/Val/Thr-binding protein (LIVT-BP) | livJ livB STM3567 | P17215 | 1 |
| Leucine ABC transporter subunit substrate-binding protein LivK | B195_10941 | M5QY71 | 1 |
| Leucine dehydrogenase (LeuDH) (EC 1.4.1.9) | yqiT BSU24080 | P54531 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS Fphi_1752 | B0U0E8 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS B195_13116 | M5QZG0 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS YPO2610 y1184 YP_1103 | Q8ZDF8 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS Rv0041 MTCY21D4.04 | P9WFV1 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS KPR_3901 | R4YH52 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS b0642 JW0637 | P07813 | 1 |
| Leucine--tRNA ligase (EC 6.1.1.4) (Leucyl-tRNA synthetase) (LeuRS) | leuS SPy_0173 M5005_Spy0147 | Q9A1P0 | 1 |
| Leucine-responsive regulatory protein | lrp alsB ihb livR oppI b0889 JW0872 | P0ACJ0 | 1 |
| Leucine-rich repeat domain protein | MXAN_4062 | Q1D533 | 1 |
| Leucine-specific-binding protein (L-BP) (LS-BP) | livK livC STM3564 | P0A1W6 | 1 |
| Leucine/isoleucine/valine transporter ATP-binding subunit | livG B195_10956 | M5QUT0 | 1 |
| Leucyl aminopeptidase (EC 3.4.11.1) | Fphi_1677 | B0TZZ0 | 1 |
| Leukotoxin | SC1083_1343 | G4A935 | 1 |
| Lipase 1 (EC 3.1.1.3) (Glycerol ester hydrolase 1) | lipA SAOUHSC_03006 | Q2FUU5 | 1 |
| Lipase 2 (EC 3.1.1.3) (Glycerol ester hydrolase 2) | lip2 geh MW0297 | Q8NYC2 | 1 |
| Lipase 2 (EC 3.1.1.3) (Glycerol ester hydrolase 2) | lip2 geh SAOUHSC_00300 | Q2G155 | 1 |
| Lipase/acylhydrolase, GDSL family | FSU_3045 | D9S7Q9 | 1 |
| Lipase/acylhydrolase, GDSL family | FSU_2704 | C9RK20 | 1 |
| Lipase/esterase | Fphi_1796 | B0U0S0 | 1 |
| Lipid A biosynthesis lauroyltransferase (EC 2.3.1.241) (Kdo(2)-lipid IV(A) lauroyltransferase) | lpxL PA3242 | Q9HYZ8 | 1 |
| Lipid A biosynthesis lauroyltransferase (EC 2.3.1.241) (Kdo(2)-lipid IV(A) lauroyltransferase) | lpxL VSAK1_26710 | A6D8V9 | 1 |
| Lipid A deacylase (EC 3.1.1.77) (LPS 3-O-deacylase) (Outer membrane enzyme) | B195_04796 | M5R2A4 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA PP_4935 | Q88D92 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA HPSD74_1933 | U4S9A0 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA VSAK1_03942 | A6D8M0 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA OOM_0602 | I2AY67 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA b0914 JW0897 | P60752 | 1 |
| Lipid A export ATP-binding/permease protein MsbA (EC 3.6.3.-) | msbA valA FTT_0109 | Q5NIG3 | 1 |
| Lipid A palmitoyltransferase PagP (EC 2.3.1.251) (Antimicrobial peptide resistance) (Lipid A acylation protein) | pagP STM0628 | Q8ZR06 | 1 |
| Lipid A palmitoyltransferase PagP (EC 2.3.1.251) (Lipid A acylation protein) | pagP crcA SFV_0703 | Q0T6N3 | 1 |
| Lipid A-core, surface polymer ligase | waaL SSON_3783 | Q3YVY6 | 1 |
| Lipid II:glycine glycyltransferase (EC 2.3.2.16) (Factor essential for expression of methicillin resistance X) | femX fmhB SAOUHSC_02527 | Q2FVZ4 | 1 |
| Lipid III flippase | wzxE wzx yifJ b3792 JW3766 | P0AAA7 | 1 |
| Lipid-A-disaccharide synthase (EC 2.4.1.182) | lpxB FTT_1568c | Q5NEQ2 | 1 |
| Lipoamide acyltransferase component of branched-chain alpha-keto acid dehydrogenase complex (EC 2.3.1.168) (Branched-chain alpha-keto acid dehydrogenase complex component E2) (BCKAD-E2) (BCKADE2) (Dihydrolipoamide acetyltransferase component of branched-chain alpha-keto acid dehydrogenase complex) (Dihydrolipoamide branched chain transacylase) (Dihydrolipoyllysine-residue (2-methylpropanoyl)transferase) | bfmBB bfmB bfmB2 BSU24030 | P37942 | 1 |
| Lipoarabinomannan carrier protein LprG (27 kDa lipoprotein) (Antigen P27) (Lipoprotein LprG) (Triacylated glycolipid carrier LprG) (Triacylglyceride transfer protein LprG) | lprG lpp-27 Rv1411c MTCY21B4.28c | P9WK45 | 1 |
| Lipoate--protein ligase (EC 6.3.1.20) | SPy_1033 | Q99ZX3 | 1 |
| Lipoate--protein ligase (EC 6.3.1.20) | lplA SPy_1214 | Q99ZI8 | 1 |
| Lipolytic enzyme | FTN_0436 | A0Q524 | 1 |
| Lipopolysaccharide biosynthetic protein LpxO1 | lpxO1 PA4512 | Q9HVQ9 | 1 |
| Lipopolysaccharide export system protein LptA | lptA VC_2527 | Q9KP50 | 1 |
| Lipopolysaccharide export system protein LptC | lptC PP_0955 | Q88P97 | 1 |
| Lipopolysaccharide export system protein LptC | yrbK lptC YPO3579 | Q7CL87 | 1 |
| Lipopolysaccharide protein | FTT_0256c | Q5NI34 | 1 |
| Lipoprotein | nlpD KPN_03104 | A6TD34 | 1 |
| Lipoprotein | NMH_1286 | E6MY46 | 1 |
| Lipoprotein | B195_20330 | M5QQJ1 | 1 |
| Lipoprotein | B195_19693 | M5QQK2 | 1 |
| Lipoprotein | B195_19978 | M5QUI1 | 1 |
| Lipoprotein | B195_19206 | M5QUM5 | 1 |
| Lipoprotein | B195_19176 | M5QR84 | 1 |
| Lipoprotein | B195_18401 | M5QFQ8 | 1 |
| Lipoprotein | B195_17459 | M5QVN6 | 1 |
| Lipoprotein | B195_10716 | M5QY22 | 1 |
| Lipoprotein | B195_10996 | M5QH78 | 1 |
| Lipoprotein | B195_12151 | M5QJJ9 | 1 |
| Lipoprotein | B195_12241 | M5QYZ0 | 1 |
| Lipoprotein | B195_08717 | M5QX04 | 1 |
| Lipoprotein | B195_08872 | M5QJ35 | 1 |
| Lipoprotein | B195_05900 | M5QK53 | 1 |
| Lipoprotein | B195_04552 | M5QZH3 | 1 |