为什么要对抗体进行敲除验证？
找零难？支付宝应运而生了！ 打车难？滴滴出行应运而生了！ 抗体特异性验证难？敲除验证应运而生了！
敲除是怎么做的？
具备CRISPR/Cas9技术平台和慢病毒/腺病毒转染平台。
下图为慢病毒侵染系统和CRISPR/Cas9技术结合转染目的细胞。
抗体是怎么进行敲除验证的？
以BECN1为例：
（1）选择序列并化学合成20nt的guide序列及其互补序列，构建含有sgRNA序列信息的LentiCRISPRv2重组载体。
（2）重组载体和慢病毒包装质粒共同转染293T细胞，收集病毒颗粒直接侵染MCF-7细胞株，通过嘌呤霉素筛选，最终获取稳定转染的细胞株。
（3）在细胞株内，Cas9和sgRNA结合成剪切复合体，被转运进入细胞核，以完成对sgRNA互补DNA片段的剪切。测序结果如下：
（4）抗体的敲除验证结果：
利用成功敲除BECN1的细胞株检测相应的抗体，结果显示敲除成功的细胞系中，抗体检测到的BECN1表达量低。证明这些抗体是特异识别目的蛋白的。检测结果如下：
Cloud-Clone部分抗体的敲除验证结果
Cloud-Clone经过敲除验证的部分抗体列表
| 货号 | 指标 | 敲除验证使用的细胞系 |
|---|---|---|
| MAA788Hu22 | Programmed Cell Death Protein 1 Ligand 1 (PDCD1LG1) | MB231 |
| MAB062Hu22 | Heat Shock 70kDa Protein 1 Like Protein (HSPA1L) | Raji, Hela, HepG2 |
| MAC823Hu22 | Thymidine Kinase 1, Soluble (TK1) | MCF7, 293T, Hela |
| MAE786Hu21 | Annexin A3 (ANXA3) | HepG2 |
| MAE787Hu22 | Annexin A1 (ANXA1) | Hela, HepG2 |
| PAA009Hu02 | Angiopoietin 2 (ANGPT2) | K562 |
| PAA150Hu01 | Carcinoembryonic Antigen (CEA) | Hela |
| PAA153Hu01 | Alpha-Fetoprotein (aFP) | HepG2 |
| PAA492Hu01 | Keratin 1 (KRT1) | A431, A375, H460, Hela |
| PAA537Hu02 | Enolase, Neuron Specific (NSE) | HepG2, 293T, A549, MCF7 |
| PAA651Hu01 | Hyaluronan Binding Protein 1 (HABP1) | Hela, A549 |
| PAA751Hu01 | Programmed Cell Death Protein 1 (PDCD1) | Jurkat |
| PAA778Hu01 | B-Cell Leukemia/Lymphoma 2 (Bcl2) | Jurkat, U-937 |
| PAA853Hu03 | Caspase 8 (CASP8) | Hela, HepG2 |
| PAB215Hu03 | Fibrinogen Beta (FGb) | Hela |
| PAB231Hu01 | Keratin 18 (KRT18) | Hela, MCF7 |
| PAB233Hu01 | Cyclin Dependent Kinase 4 (CDK4) | Hela, MCF7 |
| PAB698Hu01 | Lactate Dehydrogenase B (LDHB) | Jurkat, PC3, A431 |
| PAB769Hu01 | S100 Calcium Binding Protein A6 (S100A6) | Hela, A549, MCF7 |
| PAB905Hu01 | Interleukin 7 Receptor (IL7R) | K562, Jurkat |
| PAC598Hu03 | Vanin 1 (VNN1) | BXPC-3, PC-3 |
| PAE528Hu01 | Phosphoglycerate Mutase 1, Brain (PGAM1) | A431 |
| PAE748Hu01 | Karyopherin Alpha 2 (KPNa2) | HepG2, 293T, Raji |
| PAF460Hu01 | Folate Receptor 1, Adult (FOLR1) | Hela, MCF7 |
| PAA399Mu01 | High Mobility Group Protein 1 (HMG1) | HepG2 |
| PAA700Mu01 | Membrane Protein, Palmitoylated 6 (MPP6) | HepG2, 293T |
| PAK078Mu01 | Fas Associating Death Domain Containing Protein (FADD) | RaW264.7 |
| PAA849Ra01 | Glycogen Phosphorylase, Liver (PYGL) | HepG2 |
| PAB083Ra01 | Superoxide Dismutase 2, Mitochondrial (SOD2) | Hela, MCF7 |
| PAA929Bo01 | Retinol Binding Protein 4, Plasma (RBP4) | HepG2 |