Pentozy

Pentozy — rodzina organicznych związków chemicznych, cukry proste zawierające pięć atomów węgla w cząsteczce.

Do pentoz należą[1]:

Struktury pentoz

Pentozy, jak wszystkie cukry, mogą mieć konfigurację D (najczęściej spotykane naturalnie) lub L. W zależności od położenia grupy karbonylowej należą do grupy aldoz (aldopentozy) lub ketoz (ketopentozy)[4][5].

Aldopentozy (formy łańcuchowe)


D-arabinoza

D-liksoza

D-ryboza

D-ksyloza


L-arabinoza

L-liksoza

L-ryboza

L-ryboza
Ketopentozy (formy łańcuchowe)


D-rybuloza

D-ksyluloza


L-rybuloza

L-ksyluloza

W formie cyklicznej mogą ponadto występować jako pięcioczłonowe furanozy lub sześcioczłonowe piranozy, a każda forma cykliczna może mieć formę anomeru α lub β[4][5]. W roztworze są one w stanie równowagi, o różnej zawartości każdego izomeru; np. dla rybozy w D2O 76% to piranoza, dla której α/β = 1:2[6].

Cztery izomery cyklicznej D-pentozy na przykładzie D-rybozy

Przypisy

  1. ↑ Witold. Mizerski: Tablice chemiczne. Warszawa: Wydawnictwo Adamantan, 2003, s. 272-273. ISBN 83-7350-031-6.
  2. ↑ Robert Kincaid Murray, Daryl K. Granner, Victor W. Rodwell: Biochemia Harpera ilustrowana. Wyd. VI uaktualnione. Warszawa: Wydawnictwo Lekarskie PZWL, 2008, s. 143, 222. ISBN 978-83-200-3573-5.
  3. ↑ Robert Kincaid Murray, Daryl K. Granner, Victor W. Rodwell: Harper's Illustrated Biochemistry. Wyd. 26. Lange Medical Books/McGraw-Hill, 2003, s. 105. ISBN 0-07-138901-6.
  4. ↑ a b Bertram O. Fraser-Reid, Kuniaki Tatsuta, Joachim Thiem: Glycoscience. Chemistry and Chemical Biology. Berlin - Heidelberg: Springer, 2001, s. 469-470. DOI: 10.1007/978-3-642-56874-9. ISBN 978-3-540-67764-2.
  5. ↑ a b Lubert Stryer: Biochemia. Wyd. 1. Warszawa: PWN, 1986, s. 286–289. ISBN 83-01-00140-2.
  6. ↑ Felix Franks: Water. A Matrix of Life. Wyd. 2. The Royal Society of Chemistry, 2000, s. 104. DOI: 10.1039/9781847552341. ISBN 978-0-85404-583-9.

Read other articles:

Maryland

Maryland negara bagian di Amerika Serikat State of Maryland (en) flag of Maryland (en) Lagu kebangsaantanpa nilai (2021) Moto«Strong deeds, gentle words (en)» Lambang resmiBaltimore Oriole (en) dan Pasang putih Nama panggilanOld Line State Dinamakan berdasarkanHenriette Marie Tempat <mapframe>: Judul Maryland.map .map bukan merupakan halaman data peta yang sahcategoria:Articles mancats de coordenades Negara berdaulatAmerika Serikat NegaraAmerika Serikat Ibu kotaAnnapolis Pembagian adm...

 

Mitra Adiperkasa

PT Mitra Adiperkasa TbkJenisPerusahaan publikKode emitenIDX: MAPIIndustriRitelDidirikan23 Januari 1995; 29 tahun lalu (1995-01-23)KantorpusatJakarta, IndonesiaWilayah operasiAsia TenggaraTokohkunciHerman Bernhard Leopold Mantiri[1](Direktur Utama)Sri Indrastuti Hadiputranto[1](Komisaris Utama)PendapatanRp 18,424 triliun (2021)[2]Laba bersihRp 583 milyar (2021)[2]Total asetRp 16,783 triliun (2021)[2]Total ekuitasRp 7,096 triliun (2021)[2]Pem...

 

Letitia James

Letitia James Letitia Ann Tish James (lahir 18 Oktober 1958) adalah seorang pengacara, aktivis dan politikus Amerika Serikat. Ia adalah anggota Partai Demokrat dan Jaksa Agung New York saat ini, memenangkan pemilu 2018 untuk menggantikan jaksa agung Barbara Underwood. Ia adalah Afrika-Amerika pertama dan wanita pertama yang terpilih pada jabatan tersebut.[1] Referensi ^ Westerman, Ashley (January 1, 2019). N.Y. Swears In New Attorney General After A Tumultuous Year For The Office. NPR...

Stasiun Kaizaki

Stasiun Kaizaki海崎駅Stasiun Kaizaki pada 2008LokasiJepangKoordinat32°59′46″N 131°53′17″E / 32.99611°N 131.88806°E / 32.99611; 131.88806Koordinat: 32°59′46″N 131°53′17″E / 32.99611°N 131.88806°E / 32.99611; 131.88806Operator JR KyushuJalur■ Jalur Utama NippōLetak194.8 km dari KokuraJumlah peron2 peron sampingKonstruksiJenis strukturAtas tanahInformasi lainStatusTanpa stafSitus webSitus web resmiSejarahDibuka01 Juli ...

 

Provinsi Gaza

GazaProvinsiGaza, Provinsi di MozambikNegaraMozambikIbu kotaXai-XaiLuas • Total75.709 km2 (29,231 sq mi)Populasi (2017) • Total1.422.460 • Kepadatan19/km2 (49/sq mi)Postal code12xxKode area telepon(+258) 281, 282IPM (2019)0.449[1]rendahSitus webwww.gaza.gov.mz Provinsi Gaza merupakan sebuah provinsi di Mozambik. Provinsi ini memiliki luas wilayah 75.709 km². Dengan memiliki jumlah penduduk sebanyak 1,422,460 jiwa (2017...

 

Widjang Pranjoto

Widjang Pranjoto Dirhubad ke-23Masa jabatan4 Desember 2017 – 24 Juli 2020 PendahuluTidak ada, Jabatan baruPenggantiWahyu Agung Prayitno Informasi pribadiLahir13 November 1965 (umur 58)Madiun, Jawa TimurAlma materAkademi Militer (1989)Karier militerPihak IndonesiaDinas/cabang TNI Angkatan DaratMasa dinas1989—2023Pangkat Brigadir Jenderal TNINRP32810SatuanPerhubungan (Kopassus)Sunting kotak info • L • B Brigadir Jenderal TNI (Purn.) Widjang Pranjoto...

Gibraltar

GibraltarGibraltar (Inggris, Spanyol) Bendera Lambang Semboyan: Montis Insignia Calpe(Latin: Lencana Batu Gibraltar)Lagu kebangsaan: God Save the KingLagu nasional: Gibraltar Anthem Ibu kotaGibraltar36°8′N 5°21′W / 36.133°N 5.350°W / 36.133; -5.350Distrik terpadatWestsideBahasa resmiInggrisPemerintahanDependensi parlementer• Raja Charles III• Gubernur Edward Davis• Ketua Menteri Fabian Picardo LegislatifParliamentPembentukan•...

 

Enzo Costantini

Enzo Medardo Costantini Enzo Medardo Costantini (Laveno-Mombello, 7 gennaio 1959) è un imprenditore italiano. Biografia Inizia la sua carriera da ragazzo come giovane DJ sia nelle radio locali del Varesotto sia lavorando in giro per l'Italia. Tra il 1978 e il 1979, lavorando a Radio Paesi Uniti, insieme all'amico Roberto Tondo realizza il primo record di durata in trasmissione continuata dai microfoni di una radio libera, rimanendo collegati ai microfoni in diretta per più di 66 ore[1&#...

 

Airbus A310

Short-fuselage derivative of the Airbus A300 airliner A310 redirects here. For other uses, see A310 (disambiguation). A310 An A310, landing gear and flaps extended, from Air Transat, formerly one of its largest operators Role Wide-body aircraftType of aircraft National origin Multinational[a] Manufacturer Airbus First flight 3 April 1982; 42 years ago (1982-04-03) Introduction April 1983 with Swissair Status In limited service Primary users Mahan AirULS Airlines...

Trotskyism

Variety of Marxism developed by Leon Trotsky Leon Trotsky Part of a series onTrotskyism Concepts Anti-Stalinism Critique of political economy Deformed workers' state Degenerated workers' state French Turn Leninism Economic planning Permanent revolution Political revolution Proletarian internationalism Social revolution Soviet democracy Substitutionism Transitional demand Uneven and combined development United front Vanguard party World revolution People Leon Trotsky Ted Grant Alan Woods Ivan ...

 

Margareta Cederfelt

Swedish politician This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous.Find sources: Margareta Cederfelt – news · newspapers · books · scholar · JSTOR (May 2017) (Learn how and when to remove this message) Margar...

 

豪栄道豪太郎

豪栄道 豪太郎 場所入りする豪栄道基礎情報四股名 澤井 豪太郎→豪栄道 豪太郎本名 澤井 豪太郎愛称 ゴウタロウ、豪ちゃん、GAD[1][2]生年月日 (1986-04-06) 1986年4月6日（38歳）出身 大阪府寝屋川市身長 183cm体重 160kgBMI 47.26所属部屋 境川部屋得意技 右四つ・出し投げ・切り返し・外掛け・首投げ・右下手投げ成績現在の番付 引退最高位 東大関生涯戦歴 696勝493敗...

Wannon River

River in Victoria, Australia WannonWannon River at CavendishMap of Glenelg and Wannon river basins, in western VictoriaLocationCountryAustraliaStateVictoria (Australia)RegionVictorian Midlands (IBRA), Western DistrictLocal government areasSouthern Grampians, GlenelgTownCavendishPhysical characteristicsSourceMount Wiiliam, Grampians Range • locationnortheast of Dunkeld • coordinates37°35′37″S 142°27′29″E / 37.59361°S 142.45806°E&...

 

Lasagna

Lasagna Lasagna atau lasagne adalah pasta yang dipanggang di oven dan merupakan makanan tradisional Italia. Lasagna sendiri secara harfiah adalah lasagne yang berisikan daging. Lasagna sendiri dapat diisi dengan banyak isian lainnya seperti daging, sayur-sayuran, ayam, makanan laut dan sebagainya sesuai selera. Kulit Lasagna dibuat dari adonan tepung terigu yang setelah diberikan isian, lalu dipanggang sampai matang. Pranala luar [Eng] How to make lasagna step by step Diarsipkan 2015-02-14 di...

 

Godsent

GODSENTGameCounter-Strike: Global OffensiveDota 2League of LegendsHearthstoneRainbow Six: SiegeFounded4 April 2016 (2016-04-04)LocationSwedenHead coachMaikil Golden SelimManagerMarkus pronax WallstenWebsitegodsent.gg Godsent (stylized GODSENT) is a Swedish professional esports organization formed by Markus pronax Wallsten.[1] It currently has teams competing in Counter-Strike: Global Offensive, Call Of Duty Mobile, Dota 2, Hearthstone, Rainbow Six: Siege, Apex Legends ...

Alexīs Kyritsīs

Questa voce sull'argomento cestisti greci è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Segui i suggerimenti del progetto di riferimento. Alexīs KyritsīsNazionalità Grecia Altezza198 cm Peso100 kg Pallacanestro RuoloGuardia SquadraErmis Shimatariou CarrieraSquadre di club 2002-2003 Papagou2003-2005 Aris Salonicco2005-2007 Maroussi2007-2008 AEK Atene2008-2009 PAOK Salonicco2009-2010 Kavala2010-2011 Īlysiako...

 

Christmas in Australia

Overview of the role of Christmas in Australia Christmas tree in Sydney's Martin Place, December 2021 Christmas traditions in Australia, like Christmas in New Zealand, have many similarities to British, Irish, American and Canadian traditions, including traditional Christmas symbols featuring winter iconography. This means a red fur-coated Father Christmas or Santa Claus riding a sleigh, songs such as Jingle Bells, and various Christmas scenes on Christmas cards and decorations. However, the ...

 

Greater Moncton

Census Metropolitan Area in New Brunswick, CanadaGreater MonctonCensus Metropolitan AreaMoncton, N.B.Census Metropolitan AreaDowntown Moncton skylineInteractive Map of Moncton, N.B.   City of Moncton   City of Dieppe Coordinates: 46°5′42.2″N 64°45′13.2″W / 46.095056°N 64.753667°W / 46.095056; -64.753667Country CanadaProvince New BrunswickPrincipal cityMonctonOther citiesDieppeRiverviewArea (2021)[1] • ...

Organismós Sidirodrómon Elládos

Organisme des chemins de fer de Grèce Création 1971 Prédécesseur Société nationale des chemins de fer grecs (en) Forme juridique Entreprise publique Sigle OSE Siège social Athènes Grèce Actionnaires État grec Filiales TrainOSE (2005-2017) Site web www.ose.gr Chiffre d’affaires 105,439,000 € Bilan comptable -576,382,000 €[1] Résultat net -950,269,000 € Localisation Grèce Longueur 1 761 km à voie normale427 km à voie métrique[2] Dont électrifiés 368 km �...

 

Gareth Alban Davies

Welsh poet Gareth Alban DaviesBornGareth Alban Davies30 July 1926Ton Pentre, WalesDied9 February 2009(2009-02-09) (aged 82)Aberystwyth, WalesOccupationProfessorLiterary movementCadwgan CircleSpouseCaryl Davies Gareth Alban Davies (30 July 1926 – 9 February 2009) was a Welsh poet, educator and Hispanist who was Cowdray Professor of Spanish at the University of Leeds. Davies translated many Spanish texts into English and Welsh, and was a noted expert on the works of Fernando Arrabal and ...