XIE/2:2026/Jan
1.13
抗体还原
- 取2 ul(1mM) TCEP,用 PBS(7.4) 稀释至 20 ul(100uM),取 5 ul稀释后的 TCEP ,加入 85 ul PBS(7.40),涡旋混匀---TCEP溶液pH过低提前中和
- 取2 ul(50uM)抗体,用 PBS(pH 7.4)稀释至 10 ul(10uM),将 TECP 的 PBS 缓冲液加入其中,37℃ 孵育 2 h.
- 取1 ul(50uM)抗体,用 PBS(pH7.4)稀释至 8 ul,作为 C 组
偶联
- 将孵育好的溶液用 PBS(6.5) 洗涤4次(10000g 3.5min),均分样品(A.B)----buffer pH 6.5避免后续加入的Mal被水解(碱性易水解)
- A(共混组):向 A 中加入 5 ul(100uM) 的 Mal-PEg-DBCO 和 1 ul(1mM) Azide-ssDNA,室温避光孵育 4 h.
- B(依次组):1)向 B 中加入 5 ul(100uM) 的 Mal-PEg-DBCO,室温避光孵育 2 h. 2)孵育结束后,向其加入1 ul(1mM) Azide-ssDNA,室温避光孵育 2 h.
验证
- 强还原断开轻重链:向A、B、C中加入对应量的蛋白 loudingbuffer ,再各加入1 ulβ-巯基乙醇,100℃煮 10m in
- 10% SDS-Page.

1.19
incubation
- DNA samples were stratified by thiolation status into two primary groups: thiolated DNA (bearing a thiol modification) and non-thiolated DNA (without thiol modification). Within each primary group, samples were further subdivided by phosphate-buffered saline (PBS) pH, yielding subgroups at pH 5.5, 6.5, 6.7, 6.8, 7.0, 7.5, and 8.5. PBS solutions were prepared and adjusted to the target pH and verified with a calibrated pH meter at room temperature.
| S1 (100 μM) | S2 (100 μM) | TFO (100 μM) | Buffer |
|---|---|---|---|
| 2 μl | 2 μl | 2 μl | 194 μl |