B5
B5, B05, B-5 may refer to:
Biology
ATC code B05 (Blood substitutes and perfusion solutions), a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System
Cytochrome b5, ubiquitous electron transport hemoproteins
Cytochrome b5, type A, a human microsomal cytochrome b5
HLA-B5, an HLA-B serotype
Pantothenic acid (a.k.a. vitamin B5), a water-soluble vitamin
Proanthocyanidin B5, a B type proanthocyanidin
Entertainment
Alekhine's Defence (ECO code B5), a chess opening beginning with the moves e4 Nf6
B5 (band), an R&B boy band
B5 (album), B5's self-titled debut album
Babylon 5, an American science fiction television series
Transport
Amadeus (airline) (IATA code: B5), an airline based in Germany (1996–2004)
B5 and B5 DOHC, models of the Mazda B engine series
B-5, a variant of the Blackburn Baffin biplane
B5 platform, the series designator for Audi A4 from 1994–2001
Bundesstraße 5, German federal highway
