2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Lub α-helix yog ib sab tes xis helix nrog cov peptide bonds nyob rau sab hauv thiab sab saw txuas sab nraud. Nws yog stabilized los ntawm cov tsis tu ncua tsim ntawm hydrogen bonds thaum uas tig mus rau lub axis ntawm lub helix; lawv raug tsim los ntawm cov amino thiab carbonyl pawg ntawm txhua plaub peptide daim ntawv cog lus.
Alpha helices pom nyob rau hauv lub cell nyob qhov twg?
The alpha helix (α-helix) yog ib qho motif nyob rau hauv cov qauv thib ob ntawm cov proteins thiab yog txoj cai tes-helix conformation nyob rau hauv uas txhua tus caj qaum N-H pawg hydrogen daim ntawv cog lus rau qaum C=O. pawg ntawm cov amino acid nyob rau plaub seem ua ntej raws li cov protein ntau.
Cov proteins twg muaj alpha helices?
Alpha helices hauv soluble (globular) proteins
thawj ob lub qauv protein yuav tsum tau txiav txim siab, myoglobin thiab hemoglobin, muaj feem ntau ntawm alpha helices.
Puas yog Alpha Helix pom hauv alpha keratin?
α-keratin yog cov saw hlau polypeptide, feem ntau siab hauv alanine, leucine, arginine, thiab cysteine, uas ua rau txoj cai α-helix..
Alpha helix nyob qhov twg hauv cov qauv tertiary?
Piv txwv li, α-helices tej zaum yuav taw qhia thaum uas tig mus rau ib leeg lossis ntawm lub kaum sab xis. Yog li cov qauv tertiary hais txog folding ntawm qhov sib txawvntu ntawm helices, nplooj ntawv, tig, thiab cov seem ntawm cov protein rau hauv nws cov qauv peb-dimensional.
Pom zoo:
Puas alpha helices muaj proline?
Proline feem ntau pom thaum kawg ntawm α helix lossis tig los yog voj. Tsis zoo li lwm cov amino acids uas muaj nyob yuav luag tshwj xeeb hauv kev hloov pauv hauv polypeptides, proline tuaj yeem muaj nyob hauv cis-configuration hauv peptides.
Qhov twg yog qhov pom ib txwm pom thaum percussing thaj tsam plab?
Lub plab plab uas muaj roj ntau ib txwm muaj a tympanitic tympanitic Meteorism. Tshwj xeeb. Gastroenterology. Tympanite yog ib yam mob uas muaj roj ntau ntau hauv plab hnyuv thiab ua rau mob plab. Lo lus yog los ntawm Greek τύμπανο, "nruas"
Ntawm qhov capillaries pom nyob rau hauv lub cev nyob qhov twg?
Nruam: Cov capillaries no tsis muaj perforations thiab cia tsuas yog me me molecules dhau mus. Lawv tam sim no hauv nqaij, tawv nqaij, rog, thiab paj hlwb. Fenestrated: Cov capillaries no muaj cov pores me me uas tso cai rau cov molecules me los ntawm thiab nyob hauv cov hnyuv, ob lub raum, thiab cov qog endocrine.
Pom pom muaj calcium ntau nyob qhov twg?
Calcium yog nyob ib puag ncig peb. Tus tib neeg nruab nrab muaj kwv yees li 1kg ntawm calcium, ntawm 99% khaws cia hauv peb cov pob txha. Nws yog 5th feem ntau cov khoom nyob rau hauv lub ntiaj teb crust, tshwm sim dav li calcium carbonate uas yog feem ntau hu ua limestone.
Pom alpha-phellandrene nyob qhov twg?
alpha-Phellandrene yog qhov nruab nrab, insoluble hauv dej, tab sis miscible nrog ether. alpha-Phellandrene muaj mint, txuj lom, thiab turpentine saj. alpha-Phellandrene pom muaj nyob rau hauv siab tshaj plaws nyob rau hauv anises, ntau sages, thiab ceylon cinnamons thiab nyob rau hauv qis concentrations nyob rau hauv peppermints.
