Peptide daim ntawv cog lus muaj zog npaum li cas?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Cov peptide daim ntawv cog lus uas khi cov amino acids yog ib qho ntawm cov muaj zog thiab ruaj khov ntawm covalent daim ntawv cog lus . Ob lub amino acids tuaj yeem koom ua ke los ntawm lub cev qhuav dej kom tsim tau lub dipeptide. Hauv chav kuaj, peb tuaj yeem tawg, lossis hydrolyze, peptide daim ntawv cog lus feem ntau zoo los ntawm kev sib xyaw ntawm cov cua sov thiab cov kua qaub.

Tib neeg kuj nug, puas yog daim ntawv cog lus peptide muaj zog lossis tsis muaj zog?

Lub zog ntawm lub peptide daim ntawv cog lus Nws yog feem ntau tshwm sim los ntawm resonance ntawm nitrogen thiab carbonyl pawg. Cov peptide daim ntawv cog lus siv pseudo-ob daim ntawv cog lus yam ntxwv; nruj, planar, thiab muaj zog dua tshaj li ib txwm C-N ib leeg daim ntawv cog lus.

Ib sab saum toj no, hom ntawv cog lus twg yog daim ntawv cog lus peptide? A peptide daim ntawv cog lus yog amide hom ntawm covalent chemical daim ntawv cog lus txuas ob sib law liag alpha-amino acids los ntawm C1 (carbon tooj ib) ntawm ib tug alpha-amino acid thiab N2 (nitrogen tooj ob) ntawm lwm tus nrog ib peptide los yog protein chain.

Xav txog qhov no, puas peptide bonds muaj zog dua hydrogen bonds?

Qhov txawv ntawm a peptide daim ntawv cog lus thiab a hydrogen daim ntawv cog lus nyob rau hauv cov protein molecules? Nws yog ib qho tshuaj muaj zog daim ntawv cog lus thiab tsis yooj yim tawg. A hydrogen daim ntawv cog lus yog ib tug piv ntau weaker daim ntawv cog lus nruab nrab ntawm ib tug heev electronegative atom thiab hydrogen . Nws tsis yog qhov tsim nyog 'chemical' daim ntawv cog lus xws li, tab sis tseem ceeb heev.

Peptide bond txhais li cas?

A peptide daim ntawv cog lus yog tshuaj daim ntawv cog lus tsim ntawm ob lub molecules thaum pawg carboxyl ntawm ib lub molecule reacts nrog cov amino pawg ntawm lwm cov molecule, tso ib tug molecule ntawm dej (H2O). Qhov no yog lub cev qhuav dej synthesis cov tshuaj tiv thaiv (tseem hu ua cov tshuaj tiv thaiv condensation), thiab feem ntau tshwm sim ntawm cov amino acids.