Qhov sib txawv tseem ceeb ntawm ceramides thiab peptides yog tias ceramide yog ib qho khoom noj khoom haus hauv cov tawv nqaij uas ua rau cov tawv nqaij mos thiab supple, whereas peptide yog cov cim qhia ntawm tes uas muaj cov amino acids nplua nuj.
Ceramides thiab peptides yog cov tshuaj lom neeg uas muaj txiaj ntsig zoo hauv kev tsim cov khoom siv tawv nqaij. Kev sib xyaw ntawm peptides, ceramides thiab antioxidants nyob rau hauv tib lub mis siv rau cov khoom tu tawv nqaij tuaj yeem tiv thaiv daim tawv nqaij, du daim tawv nqaij thiab txawm tias cov tawv nqaij tawv los ntawm kev tshem tawm cov kab zoo thiab wrinkles.
YCeramides yog dab tsi?
Ceramides yog cov tshuaj sib xyaw ua ke uas los ntawm tsev neeg ntawm cov roj ntsha lipid molecules. Hom tshuaj no tshwm sim nyob rau hauv siab concentration nyob rau hauv lub cell membrane (ntawm eukaryotic hlwb) vim hais tias cov tshuaj no zoo li tsim lipids uas ua rau lub sphingomyelin (ib tug ntawm cov loj lipids nyob rau hauv lub cell membrane). Yog li ntawd, ceramides tuaj yeem koom nrog ntau qhov sib txawv ntawm cov xov tooj ntawm tes, suav nrog kev tswj hwm ntawm kev sib txawv, kev loj hlob thiab kev ua haujlwm ntawm cov cell tuag.
Muaj peb txoj hauv kev loj ntawm kev tsim cov ceramides. Thawj txoj hauv kev yog txoj kev sphingomyelinase, uas siv cov enzyme txhawm rau txhawm rau sphingomyelin hauv cov cell membranes. Txoj kev thib ob yog txoj hauv kev "de novo", uas suav nrog kev tsim cov ceramides los ntawm cov molecules tsis tshua muaj teeb meem. Nyob rau hauv txoj kev thib peb ntawm tiam ceramide, hu ua txoj kev cawm seej, cov sphingolipids tawg mus rau hauv sphingosine. Cov sphingosine yog tom qab ntawd rov siv dua los ntawm cov txheej txheem reacylation thiaj li tsim cov ceramide.
Peb tuaj yeem pom tias ceramides yog cov khoom tseem ceeb hauv stratum corneum ntawm txheej txheej epidermis (ntawm tib neeg daim tawv nqaij). Ceramides tuaj yeem tsim cov dej tsis muaj dej thiab tiv thaiv kab mob ua ke nrog cov roj cholesterol thiab cov roj saturated fatty acids. Lub cev tiv thaiv no tuaj yeem tiv thaiv dej ntau dhau ntawm peb lub cev. Nws tseem tuaj yeem tiv thaiv kev nkag mus ntawm cov kab mob hauv lub cev. Hauv peb cov tawv nqaij, ceramide IV yog hom tshuaj lom neeg pom ntau tshaj plaws.
Peb tuaj yeem pom cov ceramides ua cov khoom xyaw hauv qee cov tshuaj pleev ib ce. Cov tshuaj tawv nqaij no tuaj yeem kho cov tawv nqaij xws li eczema. Tsis tas li ntawd, cov tshuaj no muaj txiaj ntsig zoo hauv cov khoom siv tshuaj pleev ib ce, suav nrog qee cov tshuaj ntxuav tes, tshuaj zawv plaub hau, tshuaj pleev ib ce, thiab tshuaj pleev thaiv hnub. Ceramides tuaj yeem kho qee yam mob qog noj ntshav thiab.
YPeptides yog dab tsi?
Peb tuaj yeem txhais cov peptide ua cov saw luv ntawm cov amino acids. Hauv qhov tsim peptide no, cov amino acids txuas nrog ib leeg ntawm peptide linkages (bonds). Yog li ntawd, cov amino acids hu ua "monomers". Tsis tas li ntawd, peptide bonds zoo li amide bonds. Cov peptide daim ntawv cog lus yog tsim thaum pawg carboxyl ntawm cov amino acid reacts nrog ib pawg amine ntawm lwm cov amino acid. Nws yog ib hom condensation cov tshuaj tiv thaiv uas cov dej molecule tso tawm thaum daim ntawv cog lus no. Ntxiv mus, nws yog covalent chemical bond.
Muaj ntau lub npe peb siv nrog rau peptides; dipeptides (muaj ob lub amino acids sib txuas rau ib leeg ntawm ib daim ntawv cog lus peptide), tripeptides (muaj peb cov amino acids), thiab lwm yam. Ntxiv rau qhov ntawd, polypeptides ntev, txuas ntxiv peptide chains; lawv tsis yog saws tes; Hloov chaw, cov no yog cov polymers.
Peb tuaj yeem paub qhov txawv ntawm peptide los ntawm cov protein raws li nws qhov loj me. Kwv yees li, yog tias tus naj npawb ntawm cov amino acids hauv peptide yog 50 lossis siab dua, peb hu nws cov protein. Txawm li cas los xij, nws tsis yog ib qho tseem ceeb kom paub qhov txawv ntawm lawv. Piv txwv li, peb xav txog cov protein me me xws li insulin li peptides ntau dua li cov protein.
Tsis tas li ntawd, peb lub npe amino acids uas koom nrog hauv peptides li "residues". Qhov no yog vim qhov tso tawm ntawm H + ion (los ntawm amine kawg) los yog OH- ion (los ntawm carboxyl kawg) thaum lub sij hawm tsim ntawm txhua daim ntawv cog lus peptide. Qee zaum, lawv tso ob qho tib si ions ua ke ua cov dej molecule. Tsuas yog rau cyclic peptides, tag nrho lwm cov peptides muaj N terminal (amine kawg) thiab C davhlau ya nyob twg (carboxyl kawg).
Qhov txawv ntawm Ceramides thiab Peptides yog dab tsi?
Ceramides yog cov tshuaj sib xyaw ua ke uas los ntawm tsev neeg ntawm cov roj ntsha lipid molecules. Peb tuaj yeem txhais cov peptide ua cov saw luv ntawm cov amino acids. Qhov sib txawv tseem ceeb ntawm ceramides thiab peptides yog tias ceramide yog ib qho khoom noj khoom haus hauv cov tawv nqaij uas ua rau cov tawv nqaij mos thiab supple, whereas peptide yog cov xov tooj ntawm tes taw qhia cov khoom uas muaj nplua nuj nyob hauv cov amino acids.
Cov lus hauv qab no qhia qhov sib txawv ntawm ceramides thiab peptides kom ntxaws.
Summary – Ceramides vs Peptides
Ceramides yog cov tshuaj sib xyaw ua ke uas los ntawm tsev neeg ntawm cov roj ntsha lipid molecules. Peb tuaj yeem txhais cov peptide ua cov saw luv ntawm cov amino acids. Qhov sib txawv tseem ceeb ntawm ceramides thiab peptides yog tias ceramide yog ib qho khoom noj khoom haus hauv cov tawv nqaij uas ua rau cov tawv nqaij mos thiab supple, whereas peptide yog cov xov tooj ntawm tes taw qhia cov khoom uas muaj cov amino acids nplua nuj.
