Qhov sib txawv tseem ceeb ntawm kev tsim thiab inducible qhia yog qhov kev nthuav qhia yog kev qhia ntawm cov noob caj noob ces nyob rau theem tsis tu ncua thaum inducible qhia yog kev qhia ntawm cov noob inducible nyob rau hauv qee yam xwm txheej nkaus xwb.
Gene yog lub luag haujlwm tseem ceeb ntawm kev tsim noob neej. Cov noob muaj cov cim caj ces los ua ke cov proteins. Lawv yog thaj chaw tshwj xeeb ntawm chromosomes. Txhawm rau tsim nws cov khoom, ib tus gene yuav tsum tau txais kev qhia gene. Gene qhia yuav siv sij hawm qhov chaw ntawm ob kauj ruam: transcription thiab translation. Qee cov noob hu ua cov noob caj noob ces tau nthuav tawm tsis tu ncua hauv lub cell thiab ua ke lawv cov khoom. Hauv qhov sib piv, qee lwm cov noob hu ua inducible genes tau qhia tsuas yog nyob rau hauv qee yam mob thaum muaj qhov tsim nyog. Ib qho kev nthuav qhia yog cov noob qhia ntawm cov noob caj noob ces, thaum inducible qhia yog cov noob qhia ntawm inducible noob.
Cov lus hais tawm yog dab tsi?
Cov noob caj noob ces yog cov noob uas tau hais tawm tsis tu ncua hauv lub cell thiab tsim nws cov khoom txhua lub sijhawm ntawm tus nqi tas mus li. Yog li ntawd, constitutive expression yog hais txog qhov kev qhia ntawm ib tug constitutive noob nyob rau hauv ib tug mus tas li yam tsis muaj kev cai. Cov noob no feem ntau yog cov noob tu vaj tsev koom nrog hauv cov txheej txheem tseem ceeb rau kev ua haujlwm ntawm tes thiab muaj sia nyob ntawm cov kab mob.
Daim duab 01: Gene Expression
Glycolysis, citric acid voj voog, kev hloov pauv thiab kev txhais lus yog qee cov txheej txheem tshwm sim tsis tu ncua hauv hlwb. Cov enzymes koom nrog hauv cov txheej txheem no txuas ntxiv ua ke thiab tsim cov gens code rau cov enzymes. Lawv ib txwm nyob 'nyob' xeev.
Dab tsi yog qhov qhia tsis tau?
Inducible gene yog ib cov noob qhia nyob rau hauv tej yam kev mob thaum muaj kev xav tau rau nws cov khoom. Piv txwv li, thaum muaj ib qho substrate tam sim no, thiab nws yog ib qhov tsim nyog los metabolize nws, inducible noob qhia thiab tsim cov khoom yuav tsum tau metabolize nws. Yog li, peb hu qhov kev qhia ntawm inducible noob li inducible qhia. Tsis tas li ntawd, qhov no yog txoj kev tswj hwm.
Daim duab 02: Ib Yam Ntxim Saib Ntxim Ua - Lac Operon
Lub xub ntiag ntawm cov tshuaj tswj hwm tshwj xeeb xws li inducer lossis activator yog qhov tseem ceeb hauv kev qhia cov noob caj noob ces. Tshwj xeeb ntawm qhov kev qhia no yog tias nws tshwm sim thaum xav tau. Ntxiv mus, inducible gene qhia tshwm sim thaum muaj ib qho tsis txaus ntawm ib qho molecule nyob rau hauv lub cell. Lac operon tam sim no nyob rau hauv cov kab mob yog ib qho piv txwv rau inducible genes. Tsis tas li ntawd, gene glucokinase yog ib qho piv txwv ntawm cov noob tsis muaj zog hauv tib neeg.
Dab tsi yog qhov zoo sib xws ntawm Kev Tsim Nyog thiab Inducible Expression?
- Kev tsim cov noob qhia thiab kev qhia cov noob tsis muaj peev xwm yog ob ntawm peb hom kev qhia gene.
- Nyob rau hauv ob hom, noob tau txais kev sau thiab txhais lus.
Dab tsi yog qhov txawv ntawm Kev Tsim Kho thiab Kev Qhia Tsis Txaus Siab?
Cov lus qhia yog hais txog qhov kev qhia ntawm cov noob caj noob ces ntawm tus nqi tas mus li hauv ib lub xovtooj tsis hais txog qhov xwm txheej ib puag ncig. Piv txwv li, inducible qhia hais txog kev qhia ntawm inducible noob nyob rau hauv tej yam kev mob. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev tsim thiab kev qhia tsis tsim nyog. Tsis tas li ntawd, cov noob caj noob ces tseem nyob rau txhua lub sijhawm thaum cov noob tsis muaj zog tig rau thaum tsuas yog xav tau. Yog li ntawd, qhov no kuj yog qhov sib txawv ntawm kev tsim thiab inducible qhia.
Cov hauv qab no infographic qhia txog qhov sib txawv ntawm kev tsim thiab kev qhia tsis raug.
Summary – Constitutive vs Inducible Expression
Muaj peb hom kev qhia noob caj noob ces raws li kev tsim, inducible thiab repressible. Constitutive gene expression yog qhov kev qhia tas li ntawm cov noob caj noob ces ntawm ib lub cell. Nyob rau hauv sib piv, qhov inducible qhia yog kev qhia ntawm inducible noob ntawm ib tug cell thaum xav tau. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev tsim thiab kev qhia tsis tsim nyog. Cells xav tau cov khoom ntawm constitutive qhia tsis tu ncua thaum lub hlwb xav tau cov khoom ntawm inducible qhia nyob rau tej lub sij hawm.
