抗体药物偶联物ADC-抗体与药物连接位点的选择

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抗体药物偶联物(antibody-drug conjugate，ADC)是通过一个化学链接将具有生物活性的小分子药物连接到单抗上，单抗作为载体将小分子药物靶向运输到目标细胞中，

抗体是一类具有特殊亲和力的蛋白，利用其对靶细胞特异性的结合，有望作为药物靶向递送的载体，进而增强药物的选择性。

抗体与药物连接位点的选择:

对抗体进行药物偶联时，往往使用带有特殊侧链的氨基酸作为反应位点。其中以半胱氨酸和赖氨酸为主。半胱氨酸在抗体中以二硫键的形式存在，因此需要对其进行还原为自由巯基进行下一步反应。其中在抗体（IgG）链间有4对二硫键，比较容易被还原。而在抗体链内，有12对二硫键，较难被还原。赖氨酸则分布于抗体结构域，大约有86个赖氨酸残基，其中有大约20个赖氨酸残基可作为连接位点。除选择氨基酸残基外，选取保守糖基化的多糖作为修饰位点也是可行的。

西安齐岳生物供应相关产品目录：

cas:2128735-22-6 Amine-PEG2-Mal-PEG2-amine

cas:2128735-26-0 NH-Boc-PEG2-Mal-PEG2-NH-Boc

cas:2100306-51-0 t-butyl ester-PEG2-Mal-PEG2-t-butyl ester

cas:342818-95-5 Hydroxy-PEG2-N-methyl-PEG2-Hydroxy

cas:2055014-77-0 Acid-PEG4-N-methyl-PEG4-acid

cas:1835759-84-6 Alkyne-PEG2-N-methyl-PEG2-alkyne

cas:2182601-79-0 Methyl-PEG4-N-OH-PEG4-methyl

cas:1964503-35-2 Acid-PEG4-Biotin-PEG4-acid

cas:2100306-84-9 Amine-PEG4-Biotin-PEG4-acid

cas:2112731-59-4 N3-PEG2-Biotin-PEG3-acid

cas:2353409-72-8 DBCO-PEG4-Biotin-PEG4-NHS ester

cas:2055041-21-7 Acid-PEG4-S-PEG4-acid

cas:2055023-77-1 N3-PEG3-S-PEG3-N3

cas:2055041-24-0 N3-PEG3-S-PEG4-alkyne

cas:2055041-19-3 N3-PEG3-S-PEG4-t-butyl ester

cas:2173095-09-3 Methyl-PEG3-S-PEG2-hydroxy

cas:2055040-85-0 Methyl-PEG3-S-PEG4-alkyne

cas:2055040-96-3 Methyl-PEG3-S-PEG3-t-butyl ester

cas:2055041-20-6 Acid-PEG4-S-PEG4-alkyne

cas:2055041-17-1 Alkyne-PEG4-S-PEG4-alkyne

cas:2055041-18-2 Alkyne-PEG4-S-PEG4-t-butyl ester

cas:2055024-37-6 Acid-PEG4-Sulfone-PEG4-acid

cas:2055024-42-3 N3-PEG3-Sulfone-PEG4-acid

cas:2055024-45-6 N3-PEG3-Sulfone-PEG3-N3

cas:2055023-76-0 N3-PEG3-Sulfone-PEG4-t-butyl ester

cas:1919045-04-7 Methyl-PEG3-Sulfone-PEG3-acid

cas:1895922-76-5 Methyl-PEG3-Sulfone-PEG3-N3

cas:1919045-00-3 Methyl-PEG3-Sulfone-PEG2-hydroxy

cas:2055041-02-4 Methyl-PEG3-Sulfone-PEG4-alkyne

cas:2055041-00-2 Methyl-PEG3-Sulfone-PEG3-t-butyl ester

cas:2055024-41-2 Alkyne-PEG4-Sulfone-PEG4-acid

cas:2055041-02-4 Methyl-PEG3-Sulfone-PEG4-alkyne

cas:2055041-00-2 Methyl-PEG3-Sulfone-PEG3-t-butyl ester

cas:2055024-41-2 Alkyne-PEG4-Sulfone-PEG4-acid

cas:229977-57-5 MAC glucuronide linker-2

cas:791028-27-8 Amino-PEG2-C2-acid

cas:55750-61-3 AMAS

cas:1263044-56-9 MC-PEG2-C2-NHS ester

cas:185022-12-2 Aminooxy-PEG2-alcohol

cas:882847-34-9 Fmoc-NH-PEG6-CH2CH2COOH

cas:1061569-06-9 Ald-Ph-amido-PEG2

cas:132178-37-1 Propargyl-C1-NHS ester

cas:1807503-88-3 THP-SS-PEG1-Boc

cas:875770-32-4 Propargyl-PEG4-Tos

cas:2055014-98-5 Acid-PEG3-SS-PEG3-acid

cas:2182601-68-7 DBCO-PEG4-DBCO

cas:2110448-97-8 Gly-PEG3-amine

cas:1599440-15-9 MC-Gly-Gly-Phe

cas:1599472-25-9 Mal-PEG6-NHS ester

cas:331242-61-6 N-Boc-PEG6-alcohol

cas:1008402-79-6 Bis-PEG9-NHS ester

cas:876345-13-0 Boc-NH-PEG4-CH2COOH

cas:1002342-83-7 Ald-CH2-PEG3-azide

cas:1884578-00-0 Boc-Val-Ala-PAB-PNP

cas:1286837-77-1 trans-Sulfo-SMCC

cas:1309460-27-2 Ald-Ph-amido-PEG4-C2-acid

cas:2101206-86-2 SPDMV-sulfo

cas:1391914-41-2 Propargyl-PEG1-SS-alcohol

cas:1395786-30-7 DBCO-Maleimide

cas:67319-28-2 m-PEG3-CH2CH2COOH

cas:27425-92-9 m-PEG10-alcohol

cas:1257063-35-6 Azido-PEG4-C2-acid

cas:2101206-21-5 Ald-Ph-amido-PEG3-C2-Pfp ester

cas:1415328-95-8 NHPI-PEG4-C2-NHS ester

cas:1347760-82-0 Propargyl-PEG3-acid

cas:1353012-00-6 N3-PEG4-C2-Pfp ester

cas:1807518-67-7 Bromoacetamido-PEG4-acid

cas:635287-26-2 Fmoc-NH-PEG5-CH2COOH

cas:955094-26-5 Mal-amido-PEG2-NHS ester

cas:881895-59-6 6-O-2-Propyn-1-yl-D-galactose

cas:178685-33-1 Azide-PEG3-Tos

cas:1043426-13-6 Aminooxy-PEG2-azide

cas:2055041-39-7 Mal-PEG4-Val-Cit-PAB-OH

cas:1007215-94-2 Ald-Ph-amido-PEG3-C1-Boc

cas:1116086-09-9 Fmoc-Phe-Lys(Trt)-PAB-PNP

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