Qhov sib txawv tseem ceeb ntawm hemocyanin thiab hemoglobin yog tias hemocyanin yog tooj liab-muaj cov kab mob ua pa ntxiv nyob rau hauv qee cov ntshav invertebrate thaum hemoglobin yog cov hlau uas muaj cov kab mob hauv lub cev ua pa muaj nyob hauv cov ntshav vertebrate.
Hauv cov kab mob aerobic, kev sib pauv roj tshwm sim los ntawm cov metalloproteins tam sim no hauv cov ntshav. Yog li, hemocyanin thiab hemoglobin yog ob lub metalloproteins uas pab txhawb kev sib pauv roj hauv cov tsiaj txhu thiab cov tsiaj vertebrate, feem. Hemocyanin yog tooj liab-muaj xim ua pa uas pom tau raug tshem tawm hauv hemolymph ntawm invertebrates. Nyob rau hauv sib piv, hemoglobin yog ib tug hlau-muaj cov pa pigment uas yog khi rau cov qe ntshav liab ntawm vertebrates. Daim ntawv oxygenated ntawm hemocyanin yog xim xiav. Tab sis, daim ntawv oxygenated ntawm hemoglobin yog xim liab.
Hemocyanin yog dab tsi?
Hemocyanin yog cov xim ua pa uas muaj nyob hauv qee cov tsiaj txhu, tshwj xeeb tshaj yog nyob rau hauv mollusks. Nws yog tooj liab-muaj metalloprotein uas qhia tau hais tias muaj kev sib raug zoo rau oxygen. Yog li, nws ua haujlwm zoo ib yam li cov hemoglobin hauv cov pob txha. Tab sis, tsis zoo li hemoglobin, hemocyanin tsis khi rau ib lub cell. Hloov chaw, nws raug tshem tawm ncaj qha rau hauv hemolymph thiab thauj oxygen los ntawm lub cev. Yog li ntawd, lawv yog cov dawb-floating proteins hauv cov ntshav. Keeb kwm, hemocyanin tsis muaj xim. Thaum nws khi nrog oxygen, nws dhau los ua xim xiav.
Daim duab 01: Hemocyanin
Structurally, hemocyanin yog tsim los ntawm ntau subunits uas muaj imidazole rings ntawm rau histidine residues. Txhua subunit hnyav txog 75 kilod altons (kDa). Txij li thaum muaj ntau subunits, hemocyanin yog ib tug loj molecule uas muaj ib tug siab molecular hnyav piv rau hemoglobin. Tsis tas li ntawd, raws li kev tshawb nrhiav, nws tau pom tias hemocyanin yog hom tshwj xeeb. Arthropods thiab mollusks muaj ntau hom hemocyanins.
Hemoglobin yog dab tsi?
Hemoglobin (Hgb) yog ib qho tseem ceeb ntawm metalloprotein molecule tam sim no nyob rau hauv vertebrate cov qe ntshav liab uas thauj cov pa oxygen los ntawm lub ntsws mus rau lwm cov ntaub so ntswg ntawm lub cev thiab carbon dioxide los ntawm cov ntaub so ntswg ntawm lub cev mus rau lub ntsws. Yog li, nws ua haujlwm ua pa pigment. Hemoglobin molecule yog tsim los ntawm plaub sub protein molecules nyob rau hauv uas ob chains yog alpha globulin chains thiab lwm yam ob yog beta globulin chains. Nyob rau hauv txhua globulin saw, muaj hlau-muaj porphyrin compound hu ua heme pawg. Nyob rau hauv txhua pawg heme, muaj ib tug embedded hlau atom. Cov proteins uas muaj hemoglobin hlau no yog lub luag haujlwm rau cov ntshav liab. Raws li txoj cai, hemoglobin yog tsim los ntawm C, H, N, thiab O.
Daim duab 02: hemoglobin
Hemoglobin yog lub ntsiab protein molecule uas muab cov qauv ntawm cov qe ntshav liab, uas yog cov duab puag ncig nrog qhov chaw nqaim. Hlau atoms thiab cov duab ntawm cov qe ntshav liab yog qhov tseem ceeb rau kev thauj cov pa oxygen los ntawm cov ntshav. Yog tias cov duab ntawm hemoglobin raug rhuav tshem, nws tsis thauj oxygen. Sickle cell hemoglobin yog ib hom kev txawv txav hemoglobin molecule uas ua rau cov kab mob anemia hu ua sickle cell anemia.
Nyob rau hauv ib txwm hemoglobin, hauv beta chains, 6th txoj hauj lwm ntawm cov amino acid saw yog tsim los ntawm glutamic acid. Txawm li cas los xij, hauv cov kab mob cell hemoglobins, 6 th txoj haujlwm yog coj los ntawm cov amino acid sib txawv hu ua valine. Txawm hais tias nws yog ib qho kev sib txawv ntawm cov amino acid, nws yog lub luag haujlwm rau qhov kev phom sij rau lub neej no.
Feem ntau, hemoglobin qhia tau tias muaj kev sib raug zoo dua rau cov pa oxygen vim tias muaj plaub qhov chaw sib txuas oxygen nyob rau hauv ib lub hemoglobin molecule. Thaum hemoglobin molecule yog saturated nrog oxygen, cov ntshav yuav ci liab xim thiab lub xeev no hu ua oxygenated ntshav. Lub xeev thib ob ntawm hemoglobin yog hu ua deoxyhemoglobin uas tsis muaj oxygen. Hauv lub xeev no, cov ntshav dais xim liab tsaus.
Dab tsi zoo sib xws ntawm Hemocyanin thiab hemoglobin?
- Hemocyanin thiab hemoglobin yog cov proteins.
- Ob hom molecules ua haujlwm ua pa pigments.
- Lawv nqa oxygen mus rau lub cev nqaij daim tawv.
- Yog li ntawd, lawv tuaj yeem khi nrog oxygen.
Qhov txawv ntawm Hemocyanin thiab hemoglobin yog dab tsi?
Hemocyanin yog cov protein uas muaj tooj liab tam sim no raug tshem tawm hauv hemolymph ntawm invertebrates uas thauj oxygen hauv lub cev. Ntawm qhov tod tes, hemoglobin yog cov protein uas muaj hlau nyob hauv cov qe ntshav liab ntawm cov pob txha uas thauj cov pa oxygen thiab carbon dioxide los ntawm cov ntshav. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm hemocyanin thiab hemoglobin. Raws li txoj cai, hemocyanin yog tsim los ntawm ntau cov protein subunits, thaum hemoglobin yog tsim los ntawm ob alpha chains thiab ob beta chains.
Ntxiv mus, hemocyanin yog cov protein uas tsis muaj ntab, thaum hemoglobin khi rau cov qe ntshav liab. Lwm qhov sib txawv tseem ceeb ntawm hemocyanin thiab hemoglobin yog lub hauv paus ion ntawm hemocyanin yog tooj liab thaum lub hauv paus ion ntawm hemoglobin yog hlau. Qhov tseem ceeb tshaj plaws, cov xim ntawm hemocyanin yog xiav thaum xim ntawm hemoglobin liab. Yog li, qhov no lwm qhov sib txawv loj ntawm hemocyanin thiab hemoglobin.
Summary – Hemocyanin vs Hemoglobin
Hemocyanin thiab hemoglobin yog ob lub metalloproteins uas thauj oxygen los ntawm cov ntshav. Yog li ntawd, lawv yog cov pigments ua pa uas ua haujlwm ua cov pa oxygen. Qhov sib txawv tseem ceeb ntawm hemocyanin thiab hemoglobin yog tias hemocyanin yog tooj liab-muaj protein ntau ntxiv thaum hemoglobin yog cov hlau uas muaj cov protein hauv cov cell. Ntxiv mus, hemocyanins pom muaj nyob rau hauv cov tsiaj txhu, tshwj xeeb tshaj yog nyob rau hauv mollusks thiab arthropods, thaum hemoglobins muaj nyob rau hauv cov ntshav vertebrate. Tsis tas li ntawd, cov xim ntawm oxygenated hemocyanin yog xiav thaum cov xim ntawm cov pa oxygenated hemoglobin liab.
