Beta-globin yog ib feem (subunit) ntawm cov protein ntau hu ua hemoglobin, uas nyob hauv cov qe ntshav liab. Hauv cov neeg laus, hemoglobin ib txwm muaj plaub protein subunits: ob subunits ntawm beta-globin thiab ob subunits ntawm cov protein hu ua alpha-globin, uas yog tsim los ntawm lwm cov noob hu ua HBA.
Dab tsi yog subunits ntawm hemoglobin?
Hemoglobin yog lub npe hu ua tetramer ntawm protein subunits nrog ob α thiab ob β subunits, myoglobin, thiab ob glutamic acid residueshauv β subunits.
Puas muaj pes tsawg tus subunits muaj nyob hauv hemoglobin?
Hemoglobin suav nrog plaub subunits, txhua tus muaj ib txoj saw polypeptide thiab ib pawg heme (Daim duab 1). Tag nrho cov hemoglobins nqa tib lub pob txha caj qaum heme pawg hlau protoporphyrin IX txuam nrog cov saw hlau polypeptide ntawm 141 (alpha) thiab 146 (beta) amino acid residues.
Puas hemoglobin muaj ob lub subunits?
Haemoglobin yog tsim los ntawm plaub lub polypeptide subunits, ob alpha (α) subunits thiab ob beta (β) subunits. Txhua ntawm plaub lub subunits muaj ib tug heme (muaj hlau) molecule, qhov twg cov pa nws tus kheej yog khi los ntawm ib tug reversible cov tshuaj tiv thaiv, txhais tau hais tias ib tug hemoglobin molecule yuav thauj tau plaub oxygen molecules nyob rau tib lub sij hawm.
Puas hemoglobin hloov pauv?
Ob qho tib si hemoglobin protein thiab pawg heme tau txais hloov pauv hloov pauv raws li oxygenation thiab deoxygenation. Thaum ib pab pawgua oxygenated, cov duab ntawm hemoglobin hloov pauv hauv txoj hauv kev kom nws yooj yim dua rau lwm pab pawg heme hauv cov protein kom ua oxygenated ib yam nkaus.
