EutN (CchB) shell protein of the ethanolamine utilization microcompartiment. It is of 99 aas with a broad region of hydrophobicity throughout the N-terminal regioni, and a shorter but more hydrophobic region at the C-terminus.  It has been described by (Kinney et al. 2011). The ethanolamine (EA) catabolic bacterial microcompartment (BMC) probably concentrates low levels of ethanolamine catabolic enzymes, concentrates volatile reaction intermediates, keeps the level of toxic acetaldehyde low, generates enough acetyl-CoA to support cell growth, and maintains a pool of free coenzyme A (CoA) and NAD (Brinsmade et al. 2005; Kofoid et al. 1999Kofoid et al. 1999).