Table 1. List of GO terms used to predict protein association with the E. coli cell envelope.

Gene ontology term (Associated with cell envelope)
Anchored component of membrane	Anchored component of external side of membrane	Anchored component of periplasmic side of outer membrane	Extrinsic component of periplasmic side of plasma membrane	Gram-negative bacterium cell wall	Extrinsic component of plasma membrane
Integral component of membrane	Cell envelope	Cell outer membrane	Integral component of cell outer membrane	Integral component of plasma membrane	Integral component of membrane
membrane	Cell wall	External side of cell outer membrane	Intrinsic component of cell outer membrane	Intrinsic component membrane	Intrinsic component of plasma membrane
Plasma membrane	Extrinsic component of cell outer membrane	Extrinsic component of membrane	Intrinsic component of external side of plasma membrane	Intrinsic component of periplasmic side of plasma membrane	Intrinsic component of periplasmic side of cell outer membrane
Outer-membrane bounded periplasmic space	Periplasmic space	Plasma membrane	Intrinsic component of cytoplasmic side of plasma membrane	Outer membrane
Periplasmic side of outer membrane	Peptidoglycan-based cell wall