[求救] 如何確認長片段tandem repeat的數目
最近碰到的棘手問題懇請各位幫忙~~
目標是 MUC4,這個 gene的 exon 2 主要是由連續的tandem repeat(48bp/TR)組成
之前文獻指出每個人的這段序列長度相差很大 (7k~19k都有)
我想知道的是""我們的病人和其他正常人的這段TR數目是否有差別""
由於檢體量不多沒辦法做southern blot
之前嘗試用Long PCR的方式把整段TR P出來,可惜沒有band
PCR condition 如下
TaKaRa LA Taq (5 units/μl) 0.5 μl
10X LA PCR Buffer ll (Mg2+free) 5 μl
25 mM MgCl2 (final 2.5 mM) 5 μl
dNTP Mixture (final 400 μM each) 8 μl
Template 500 ng
Primer 1 1.0 μM (final conc.)
Primer 2 1.0 μM (final conc.)
ddH2O to 50 μl
92°C 2 min
↓
92°C 10 sec------
55°C 30 sec 10 cycles
68°C 15 min------
↓
98°C 10 sec---------------------
55°C 30 sec 20 cycles
68°C 15 min + 15 sec/cycle------
↓
68°C 7 min
不知道能怎麼調整,或是有其他方法確認TR數目
請大家幫幫忙!拜託了!!
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