Video: Dab tsi ua rau peptidoglycan nws lub zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum lub sij hawm ib txwm kab mob loj hlob, cov kab mob enzymes hu ua autolysins muab so hauv peptidoglycan kev txiav txim tso cai rau qhov tso tawm tshiab peptidoglycan monomers muaj NAG, NAM, thiab pentapeptide. Qhov no yog dab tsi muab peptidoglycan nws lub zog.
Ib yam li ntawd, nws raug nug, vim li cas peptidoglycan muaj zog molecule?
Hla-txuas ntawm cov amino acids hauv txheej ntawm peptidoglycan forms ib muaj zog mesh zoo li cov qauv uas muab cov qauv rau lub cell. Peptidoglycan muab lub luag haujlwm tseem ceeb hauv cov kab mob vim cov kab mob yog unicellular; nws muab lub zog rau sab nrauv ntawm lub cev.
Tsis tas li ntawd, peptidoglycan synthesis yog dab tsi? Lub biosynthesis ntawm cov kab mob cell phab ntsa peptidoglycan yog ib qho txheej txheem nyuaj uas cuam tshuam nrog cov tshuaj tiv thaiv enzyme uas tshwm sim hauv cytoplasm ( synthesis ntawm nucleotide precursors) thiab sab hauv ( synthesis ntawm lipid-txuas intermediates) thiab sab nraud (polymerization cov tshuaj tiv thaiv) ntawm cytoplasmic membrane.
Ua kom qhov no saib, dab tsi ua rau peptidoglycan?
Peptidoglycan (murein) yog ib qho polymer uas muaj suab thaj thiab cov amino acids uas tsim ib txheej zoo li mesh sab nraum cov plasma membrane ntawm cov kab mob feem ntau, tsim cov phab ntsa ntawm tes. Cov khoom noj qab zib muaj cov alternating residues ntawm β-(1, 4) txuas N-acetylglucosamine (NAG) thiab N-acetylmuramic acid (NAM).
Puas yog peptidoglycan yog Heteropolysaccharide?
Cov txheej txheem ntawm cov kab mob hauv lub hnab ntawv (the peptidoglycan ) yog a heteropolysaccharide ua los ntawm ob chav hloov monosaccharide.
Pom zoo:
Dab tsi nthwv dej zoo li cov cuab yeej ntawm lub teeb ua rau nws hloov kev taw qhia thaum nws txav ntawm ib nrab mus rau lwm qhov?
Refraction
Henri Becquerel nrhiav tau dab tsi uas ua rau nws tau txais 1903 Nobel nqi zog Nws nrhiav tau dab tsi txog lub caij uranium?
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