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De Havilland Canada DHC-5 Buffalo, C-5 (Cercanías Asturias), 15-Crown-5, Douglas C-54 Skymaster, Caudron C.270 Luciole, Tartrazine, Cytochrome c peroxidase, 8-Bromoguanosine 3',5'-cyclic monophosphate, Lockheed C-69 Constellation, Vitamin C, Douglas DC-5, C Sharp (programming language), Cierva C.4, Caenorhabditis sinica, Caudron C.280 Phalène, 10.5 cm Flak 38, SM UC-5, C,XOXO, Cobyrinate a,c-diamide synthase, Caudron C.440 Goéland, Division No. 5, Newfoundland and Labrador, 5C, 8-Bromoadenosine 3',5'-cyclic monophosphate, Curtiss C-46 Commando, FM Consolidation Line, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase, Fairchild C-123 Provider, ARA Nueve de Julio (C-5), SC-5, Symphony No. 5 (Dvořák), List of accidents and incidents involving the Lockheed C-130 Hercules, Cyclic-guanylate-specific phosphodiesterase, Boeing Model 2, Ford Trimotor, Cyclic adenosine monophosphate, 10.5 cm Kanone C/85, North Carolina Highway 5, USS Oahu (ARG-5), Canadair North Star, CCR5, KNHC, 2-oxo-3-(5-oxofuran-2-ylidene)propanoate lactonase, South Carolina Highway 5, Mass in C major, K. 220 "Sparrow", Short Belfast, C.L.I.F. 5, 10.5 cm SK C/28 naval gun, 10.5 cm SK C/32 naval gun, Rapid amplification of cDNA ends, USS San Francisco (C-5)

Lockheed C-5 Galaxy, CAVITEX–C-5 Link, USS C-5, Special Report on Global Warming of 1.5 °C, Circumferential Road 5, Circumferential Road 5–Ortigas Avenue Interchange, 5-Methylcytosine, Circumferential Road 5–Kalayaan Avenue Interchange, 1975 Tân Sơn Nhứt C-5 accident, SBB C 5/6, CANSA C.5, Keyboard Variations in C major (Haydn), Heparosan-N-sulfate-glucuronate 5-epimerase, 5-Carboxylcytosine, C-5 (Cercanías Madrid), C-Tractor, C5, C-5 (blimp), DS 5, Widerøe Polar, 5-Hydroxymethylcytosine, C-5 sterol desaturase, 5-Formylcytosine, Loening C-5, Kawasaki C-5, Kinner C-5, Camelliol C synthase, Symphony No. 5 (Beethoven), Carboxypeptidase C, 3-ketovalidoxylamine C-N-lyase, 2'''-acetyl-6'''-hydroxyneomycin C deacetylase, 501(c) organization, 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol kinase, Nitric oxide reductase (cytochrome c), 37.5°C no Namida, Microsoft Visual C++, 36.5°C, C. Tangana, Levasseur PL.5, D-lactate dehydrogenase (cytochrome c-553), Rumpler C.III, De Havilland Canada DHC-5 Buffalo, C-5 (Cercanías Asturias), 15-Crown-5, Douglas C-54 Skymaster, Caudron C.270 Luciole, Tartrazine, Cytochrome c peroxidase, 8-Bromoguanosine 3',5'-cyclic monophosphate, Lockheed C-69 Constellation, Vitamin C, Douglas DC-5, C Sharp (programming language), Cierva C.4, Caenorhabditis sinica, Caudron C.280 Phalène, 10.5 cm Flak 38, SM UC-5, C,XOXO, Cobyrinate a,c-diamide synthase, Caudron C.440 Goéland, Division No. 5, Newfoundland and Labrador, 5C, 8-Bromoadenosine 3',5'-cyclic monophosphate, Curtiss C-46 Commando, FM Consolidation Line, 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase, Fairchild C-123 Provider, ARA Nueve de Julio (C-5), SC-5, Symphony No. 5 (Dvořák), List of accidents and incidents involving the Lockheed C-130 Hercules, Cyclic-guanylate-specific phosphodiesterase, Boeing Model 2, Ford Trimotor, Cyclic adenosine monophosphate, 10.5 cm Kanone C/85, North Carolina Highway 5, USS Oahu (ARG-5), Canadair North Star, CCR5, KNHC, 2-oxo-3-(5-oxofuran-2-ylidene)propanoate lactonase, South Carolina Highway 5, Mass in C major, K. 220 "Sparrow", Short Belfast, C.L.I.F. 5, 10.5 cm SK C/28 naval gun, 10.5 cm SK C/32 naval gun, Rapid amplification of cDNA ends, USS San Francisco (C-5), SEC Rule 10b-5, 7.5 cm Gebirgskanone L/13 C/80, DXP reductoisomerase, Title 5 of the United States Code, P/1999 J6 (SOHO), SS Lazio Calcio a 5, Cob(I)yrinic acid a,c-diamide adenosyltransferase, Adenosylcobyric acid synthase (glutamine-hydrolysing), Phosphomethylpyrimidine synthase, Reading 5–7 Arsenal (2012), Currency and Bank Notes Act 1928, Lockheed Model 18 Lodestar, N-isopropylammelide isopropylaminohydrolase, Fairchild KR-34, List of public art in Washington, D.C., Ward 5, Calm (album), 3-deoxy-8-phosphooctulonate synthase, Indole-3-glycerol-phosphate synthase, BMW M1, Kinesin-like protein KIF11, Mach number, 1066 and All That, S-Adenosylmethionine synthetase enzyme, Mayans M.C. season 5, Bristol Scout, 23S rRNA pseudouridine955/2504/2580 synthase, Coenzyme Q5, methyltransferase, Wright R-790 Whirlwind, Ubiquitin carboxy-terminal hydrolase L1, Lohner B.II, Decitabine, Kilmarnock F.C. 5–1 Eintracht Frankfurt, Title 5 of the Code of Federal Regulations, Manchester United 3–5 West Bromwich Albion (1978), Ajax 5–1 Liverpool (1966), N-acetylneuraminate synthase, Nitromethane, Fokker F.VII, USS Narwhal (SS-167), JCPenney, Gulfstream G550, Lynx reconnaissance vehicle, 2-methylcitrate synthase, Polydeuces (moon), Polypropylene, Lockheed Vega, Crescent Boat Club, Texas State Highway 35, UDP-3-O-acyl-N-acetylglucosamine deacetylase, Spartan C5, CKKS-FM, Aminolevulinic acid synthase, Alternative-complement-pathway C3/C5 convertase, Saturn V, Beta-lactamase, Five Cs of Singapore, Motherwell F.C. 6–6 Hibernian F.C., 2-hydroxymuconate tautomerase, Orbiting Solar Observatory, Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase