The directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

The directed movement of cobalamin (vitamin B12), a water-soluble vitamin characterized by possession of a corrin nucleus containing a cobalt atom, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

The directed movement of siderophores, low molecular weight Fe(III)-chelating substances, into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

The directed movement of a colicin into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Colicins are a group of antibiotics produced by E. coli and related species that are encoded by a group of naturally occurring plasmids, e.g. Col E1.

The processes by which a bacteriophage initially commits to infection by binding the host receptor irreversibly. Disruption of the phage:cell complex at this step results in the loss of infective phage virions since the process is characterized by conformational changes of bacteriophage head and tail proteins and injection of bacteriophage proteins into the infected cell.

The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.

The region between the inner (cytoplasmic or plasma) membrane and outer membrane of organisms with two membranes such as Gram negative bacteria. These periplasmic spaces are relatively thick and contain a thin peptidoglycan layer (PGL), also referred to as a thin cell wall.

The component of the plasma membrane consisting of the gene products that penetrate only the external side of the membrane.

The component of the plasma membrane consisting of the gene products that penetrate only the external side of the membrane.

Any protein complex that is part of the plasma membrane.