Protein levels detected in culture filtrates of the wild-type strain (2 biological replicates) and strain ∆<i>flbA</i>.

Protein levels are quantified as follows: –; not detected, 1; <5 ng ml-1, 2;<50 ng ml-1, 3;<250 ng ml-1, 4: <1000 ng ml-1, 5; <4000 ng ml-1, 6; >4000 ng ml-1. Values marked with an asterix (*) had a relative standard deviation of > 50% between technical replicates. a Exp; exponential growth, Day 1,3 or 6: carbon starvation day 1, 3, 6 b SP: predicted signal peptide presence (1) or absence (0) c GPI: predicted GPI-anchor presence (1), absence (0) or ambivalence (A) Protein levels detected in culture filtrates of the wild-type strain (2 biological replicates) and strain ∆flbA.