Proteinase K (Lyophilized ntụ ntụ)
Mpempe nwamba: HC4500A
Proteinase K bụ serine protease kwụsiri ike nwere nkọwapụta mkpụrụ osisi sara mbara.Ọ na-eweda ọtụtụ protein na steeti ala ọbụna na ọnụnọ nke ncha.Ihe akaebe sitere na ọmụmụ ihe nhazi nke kristal na molecular na-egosi na enzyme bụ nke ezinụlọ subtilisin nwere triad catalytic saịtị na-arụ ọrụ (Asp).39-Ya69- Ser224).Ebe kachasị ebe mgbawa bụ njikọ peptide n'akụkụ otu carboxyl nke aliphatic na amino acid aromatic nwere otu alfa amino egbochiri.A na-ejikarị ya eme ihe maka mbara yankọwapụta.
Ọnọdụ Nchekwa
2-8 ℃ obere oge nchekwa, -25 ~ -15 ℃ ogologo oge nchekwa.Ọnọdụ ntụ ntụ -25 ~ -15 ℃ bara uru maka afọ 3;Ekwesịrị ịgbaze ntụ ntụ enzyme n'ime olu kwesịrị ekwesị.
Nkọwapụta
| Ọdịdị | Amorphous ntụ ntụ lyophilized na-acha ọcha ruo na-acha ọcha |
| Ihe omume | ≥30 U/mg |
| DNA | Ọnweghị nke achọpụtara |
| RNase | Ọnweghị nke achọpụtara |
Njirimara
| Nọmba EC | 3.4.21.64 (Mmekọrịta sitere na album Tritirachium) |
| Ibu molekụla | 29 kDa (SDS-PAGE) |
| Isi ihe nke isoelectric | 7.81 |
| pH kacha mma | 7.0-12.0 Fig.1 |
| Okpomọkụ kacha mma | 65 ℃ Fig.2 |
| pH kwụsie ike | pH 4.5-12.5 (25 ℃, 16h) Fig.3 |
| Nkwụsi ike okpomọkụ | N'okpuru 50 ℃ (pH 8.0, 30min) Fig.4 |
| Ndị na-eme ihe | SDS, urea |
| Ihe mgbochi | Diisopropyl fluorophosphate;phenylmethylsulfonyl fluoride |
Ngwa
1. Ngwa nyocha mkpụrụ ndụ ihe nketa
2. Ngwa RNA na DNA mmịpụta
3. Mwepụ nke ihe ndị na-abụghị protein sitere na anụ ahụ, mmebi nke adịghị ọcha protein, dị ka ọgwụ mgbochi DNA na nkwadebe nke heparin.
4. Nkwadebe nke chromosome DNA site pulsed electrophoresis
5. Western blot
6. Enzymatic glycosylated albumin reagents in vitro nchoputa
Mkpachapụ anya
Yiri gloves nchebe na enyo mgbe ị na-eji ma ọ bụ na-atụ aro, ma na-ekuku ikuku nke ọma mgbe ejiri ya.Ngwaahịa a nwere ike ibute mmeghachi ahụ nfụkasị anụ ahụ yana oke iwe anya.Ọ bụrụ na ikuru ume, ọ nwere ike ibute nfụkasị ahụ ma ọ bụ mgbaàmà ụkwara ume ọkụ ma ọ bụ dyspnea.Nwere ike ịkpata mgbakasị iku ume.
Nyocha
Nkọwa nkeji
A kọwapụtara otu nkeji (U) dị ka ọnụọgụ enzyme achọrọ iji hydrolyze casein iji mepụta 1 μmol tyrosine kwa nkeji n'okpuru ọnọdụ ndị a.
Reagents nkwadebe
Reagent I: 1g mmiri ara ehi casein gbazere na 50ml nke 0.1M sodium phosphate solution (pH 8.0), etinyere ya na 65-70 ℃ mmiri maka 15mins, kpalitere ma gbazee, mee ka mmiri dị jụụ, nke sodium hydroxide gbanwere na pH 8.0, na olu edoziri. 100ml.
Reagent II: 0.1M trichloroacetic acid, 0.2M sodium acetate, 0.3M acetic acid.
Reagent III: 0.4M Na2CO3ngwọta.
Reagent IV: Forint reagent ejiri mmiri dị ọcha gbazere ugboro ise.
Reagent V: ihe mgbaze enzyme: 0.1M sodium phosphate ngwọta (pH 8.0).
Reagent VI: ngwọta tyrosine: 0, 0.005, 0.025, 0.05, 0.075, 0.1, 0.25 umol/ml tyrosine gbazere na 0.2M HCL.
Usoro
1. 0.5ml nke reagent m bụ tupu warmed ka 37 ℃, tinye 0.5ml nke enzyme ngwọta, mix ọma, na incubate na 37 ℃ maka 10mins.
2. Tinye 1 ml nke reagent II iji kwụsị mmeghachi omume ahụ, gwakọta nke ọma, ma nọgide na-emepụta ihe maka 30mins.
3. Centrifugate mmeghachi omume ngwọta.
4. Were 0.5ml supernatant, tinye 2.5ml reagent III, 0.5ml reagent IV, mix ọma na incubate na 37 ℃ maka 30mins.
5. OD660e kpebisiri ike dị ka OD1;Otu njikwa oghere: 0.5ml reagent V na-eji dochie ngwọta enzyme iji chọpụta OD660dị ka OD2, ΔOD=OD1-Od2.
6. L-tyrosine ọkọlọtọ usoro: 0.5mL iche iche ịta L tyrosine ngwọta, 2.5mL Reagent III, 0.5mL Reagent IV na 5mL centrifuge tube, incubate na 37 ℃ maka 30mins, chọpụta maka OD660maka ntinye uche dị iche iche nke L-tyrosine, wee nweta usoro ọkọlọtọ Y = kX + b, ebe Y bụ mkpokọta L-tyrosine, X bụ OD.600.
Mgbakọ
2: ngụkọta olu ngwọta mmeghachi omume (mL)
0.5: Olu nke ngwọta enzyme (mL)
0.5: Mmeghachi omume olu mmiri mmiri ejiri na mkpebi chromogenic (mL)
10: Oge mmeghachi omume (nkeji)
Df: Dilution otutu
CNtinye nke enzymes (mg/mL)
Ntụaka
1. Wieger U & Hilz H. FEBS Lett.(1972); 23:77 .
2. Wieger U & Hilz H. Biochem.Biophys.Res.Kọmun.(1971); 44:513 .
3. Hilz, H.et al.,Euro.J. Biochem.(1975); 56:103–108 .
4. Sambrook Jet al., Mkpuchi nke Molecular: Akwụkwọ ntuziaka ụlọ nyocha, mbipụta nke abụọ, Cold Spring HarborLaboratory Press, Cold Spring Harbor (1989).
Fig. 2 Ọnọdụ okpomọkụ kachasị mma
Mmeghachi omume na 20 mM K-phosphate buffer pH 8.0.Ntinye uche nke enzyme: 1mg/mL
Ihe atụ 3 pH Nkwụsi ike
25 ℃, 16 h-ọgwụgwọ na 50mM ngwọta ngwọta: pH 4.5-5.5, Acetate;pH 6.0-8.0, Na-phosphate;pH 8.0-9.0, Tris-HCL.pH 9.0-12.5, Glycine-NaOH.Ntinye uche nke enzyme: 1mg/mL
Fig. 4 Thermal nkwụsi ike
Ọgwụgwọ 30 min nwere ihe nchekwa 50mM Tris-HCL, pH 8.0.Ntinye uche nke enzyme: 1mg/mL
Fig. 5 Nchekwa kwụsie ikety at 25 ℃
