產品中心
克隆感受態_熱激
XL10-Gold Chemically Competent Cell 產品說明書
產品規格 (CAT#: DL1050)
基因型
TetR Δ(mcrA)183 Δ(mcrCB-hsdSMR-mrr)173 endA1 supE44 thi-1 recA1 gyrA96 relA1 lac Hte [F? proAB lacIqZΔM15 Tn10 (TetR) Amy CamR]
產品說明
常規操作方法
Stratagene standard protocol
1. Pre-chill a 14-ml BD Falcon polypropylene
round-bottom tubes on ice. Preheat NZY+ broth to 42℃.
2. Thaw the cells on ice. When thawed, gently
mix and aliquot 100 μl of cells into the pre-chilled tubes.
3. Add 4 μl of the β-ME(β巰基乙醇) to the aliquot of cells.
4. Swirl the tubes gently. Incubate the cells
on ice for 10 minutes, swirling gently every 2 minutes.
5. Add 0.1-50 ng of the experimental DNA (or
2 μl of a ligation mixture) to the aliquot of cells.
6. Swirl the tubes gently, then incubate the
tubes on ice for 30 minutes.
7. Heat-pulse the tubes in a 42℃ water bath for 30 seconds. The duration of
the heat pulse is critical.
8. Incubate the tubes on ice for 2 minutes.
9. Add 0.9 ml of preheated (42℃) NZY+ broth and incubate the tubes at 37℃ for 1 hour with shaking at 225-250 rpm.
10. Plate ≤200
μl of the transformation mixture on LB agar plates containing the appropriate
antibiotic (and containing IPTG and X-gal if color screening is desired).
注意事項
1. 感受態細胞最好在冰中緩慢融化,插入冰中8分鐘內加入目標DNA,不可在冰中放置時間過長,長時間存放會降低轉化效率?;烊胭|?;蜻B接產物時應輕柔操作。
2. 混入質?;蜻B接產物時應輕柔操作。
3. 轉化高濃度的質?;蚋咝实倪B接產物可相應減少最終用于涂板的菌量。
4. XL10-Gold菌株對 <40 μg/ml氯霉素有抗性,但對100 μg/ml氯霉素敏感。
5.XL10-Gold感受態細胞采用常規轉化方法,轉化效率可達2×109 cfu/μg DNA;如果有更高要求,可嘗試Stratagene公司推薦的標準protocol。
說明書下載
XL10-Gold Chemically Competent Cell 產品說明書