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.
