Inventory of transporters in the complete genomes of S. cerevisiae and E. coli

Abundance of proteins

of differing predicted membrane topologies

nb TMS nb proteins % of total

Yeast E. coli Yeast E. coli

0 4364 2861 70.8 66.8

1 937 655 15.3 15.3

2-3 390 220 6.5 5.1

4-6 185 211 3.1 4.9

7-9 144 153 2.3 3.6

> 10 121 82 2.0 4.3

soluble

proteins

signal

peptides

potential

transport

proteins

(14 %)

Paulsen et al FEBS Lett (1998) 430:116-125