Daim duab no qhia txog b subunit ntawm hemoglobin, uas muaj 8 a-helices, sau npe A-H. Txhua tus a-helix tau pom nyob rau hauv ib qho xim sib txawv. Cov saw protein pib nrog A-helix (xiav) thiab xaus nrog H-helix (lavender). Cov pab pawg heme tau pom hauv liab thiab cov pa oxygen khi tau pom hauv lub teeb xiav.
Ntau npaum li cas alpha helices nyob hauv hemoglobin?
Hemoglobin muaj 2 alpha subunits thiab 2 beta subunits los muab plaub txoj saw hlau.
Ntau npaum li cas cov hemoglobin muaj?
Cov kev tshawb fawb txog kev tsim qauv tau pom tias hemoglobin muaj nyob hauv ib qho ntawm ob qhov sib txawv, hu ua T (taut) thiab R (so). Deoxygenated hemoglobin (xiav) pom nyob rau hauv T lub xeev, thiab oxygen binding (liab) ua rau kev hloov mus rau R xeev.
YPuas hemoglobin helical?
Hemoglobin muaj cov qauv quaternary yam ntxwv ntawm ntau cov protein ntau subunit globular. Feem ntau ntawm cov amino acids nyob rau hauv hemoglobin tsim alpha helices, thiab cov helices yog txuas los ntawm luv luv non-helical ntu. … Nyob rau hauv feem ntau vertebrates, lub hemoglobin molecule yog ib tug sib sau ua ke ntawm plaub globular protein subunits.
YPuas hemoglobin feem ntau yog alpha helices?
Feem ntau ntawm cov amino acids hauv hemoglobin daim ntawv alpha helices, txuas los ntawm ntu luv tsis yog helical. (Hemoglobin tsis muaj beta strands thiab tsis muaj disulfide bonds.)
