nPNA

AcronymDefinition
nPNANormalized Protein Nitrogen Appearance (nutrition)
nPNANexon Publishing North America
nPNANormal Park Neighborhood Association (Ypsilanti, MI)
nPNANon-Protein Nitrogen Appearance
nPNANormalized Protein N Appearance (biochemistry)
nPNAN-Phenyl-1-Naphthylamine