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我这里有一个从小鼠尾巴中提取基因组DNA的方法,用来做PCR,很好用。请见下面。
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. k- c# Q2 @9 U# J! h# Q5 F# dQuick Preparation of Genomic DNA Isolation from Mouse Tails
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/ ~& E& r( c+ [5 @" }1 l5 v1 P" dQuick Tail Buffer
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, ^0 l" e: [3 r9 g# Q 5 ml 1M Tris (pH 8.0)
8 m0 Y$ _5 ~/ y/ `8 F. ]25 ml 1M KCl, o5 ?% y- M8 y1 ]; _& G, e
12.5 ml 20% NP40
$ {; K2 Z6 }1 L# Y$ B12.5 ml 20% Tween 206 K; p4 g/ v# z/ L4 W
445 ml ddH2O/ |, F1 k' k3 M: P! W
500 ml
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1. Obtain 1-2mm tail tip; place in eppendorf tube.$ i& r' J& g% x
2. Add 100ul Quick tail buffer: 10mM Tris, pH 8.0 + 50mM KCl +
( P" ^6 T5 R( ]* M+ G- C0.5% NP40 + 0.5% Tween
8 i, {. J$ v: |6 T9 T1 [ 3. Heat to 95°C for 5 minutes. Spin briefly.
* A# w* J. }3 g% _ P* b2 D 4. Add 50ul Quick tail buffer + 1ul Proteinase K (20mg/ml) per sample. I + P+ v) c& G, V' E! Y; ?
usually make a master mix and then add 50 ul of buffer/proteinase K mix
! b. Q% B9 g2 C% O" { to each eppendorf tube containing the tail and 100 ul of tail buffer. Invert
1 Y( ?$ J8 [3 r the tubes a few times to mix. ( a# R# d1 g8 o9 O, p) @5 c
5. Incubate at 50-55°C waterbath for 4 hours to over night (37°C waterbath
2 W" |$ ^" s3 j3 D will be ok as well). Make sure tails are submerged in solution. For best
. I, Q# s1 |% D6 T7 Y7 H9 U) M' G results, shake the tubes a few times every a few hours during the
8 F2 A- u) |- @4 V) J% V incubation period.
8 T* [8 {) ?. {0 ~ 6. Next day, shake tubes a few times to completely dissolve the tails. 7 a0 z O" l& @: ]9 w8 d! k+ |" i
7. Incubate for another hour or longer at 50-55°C.3 h% A, d2 B/ C6 W( a
8. Heat to 95°C for 10 minutes to inactivate proteinase K.
" h: D4 E$ l! t, D' t" S. [ 9. Brief spin in centrifuge (1 minute at 10,000 rpm). Use 1 ul for PCR
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10. Store samples at -20°C if necessary.
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我想从细胞中直接裂解应该更容易些,希望对你有所启发。2 Q( u, Q V2 h) ^) k# G [% O
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