LamB porin

The Gram-negative bacteria have two membranes separated by the periplasmic space (Figure 6). Short peptides can be inserted into some surface exposed loops of outer membrane proteins (OMPs). The most used proteins are the maltoporin LamB, the outer membrane protein OmpA, and the phosphate-inducible porin PhoE. LamB is an E. coli protein. Some permissive sites have been identified [10,11], but the insertion of peptides longer than 60 amino acids perturbs its conformation and assembly. Another protein used is OmpA, which tolerates larger inserts [12,13]. Lipoproteins (Lpp, TraT, and PAL) have also been used [14-16], as well as proteins present in the filamentous structures present... 

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