Cell Signaling Technology

Product Pathways - Autophagy Signaling

LC3A/B Antibody #4108

lc3   lc3-a   lc3-b   sc-16756  

No. Size Price
4108S 100 µl ( 10 western blots ) ¥3,052.00 现货查询 购买询价
4108 carrier free & custom formulation / quantityemail request
Applications Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W 1:1000 Human,Mouse,Rat, Endogenous 14, 16 Rabbit
F 1:50
IF-IC 1:200

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting, F=Flow Cytometry, IF-IC=Immunofluorescence (Immunocytochemistry),


Species predicted to react based on 100% sequence homology: Monkey, Chicken, Xenopus, Zebrafish, Dog,

Specificity / Sensitivity

LC3A/B Antibody detects endogenous levels of total LC3A and LC3B proteins. Cross-reactivity may exist with LC3C. Stronger reactivity is observed with the type II form of LC3A/B.

LC3A/B Antibody能够检测内源性的LC3A和LC3B总蛋白。可能与LC3C存在交叉反应,与LC3A/B的II 型形式有较强的反应性。

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly40 of LC3B. Antibodies are purified by protein A and peptide affinity chromatography.

该多克隆抗体用合成的LC3B Gly40周围残基相对应的肽段免疫动物制备。抗体通过蛋白A及多肽亲和色谱法纯化。

Western Blotting

Western Blotting

Western blot analysis of extracts from various cell lines, untreated or treated with chloroquine (50 μM, overnight) using LC3A/B Antibody.

Western blot分析不同细胞系的提取物,未处理或 chloroquine (氯喹)处理(50 μM, 过夜),使用的抗体是 LC3A/B Antibody。



Confocal immunofluorescent analysis of HeLa cells, untreated (left) or chloroquine-treated (right), using LC3A/B Antibody (green). Actin filaments were labeled using DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).

共聚焦免疫荧光分析HeLa细胞,未处理(左)或 chloroquine (氯喹)处理(右),使用的抗体是LC3A/B Antibody (绿色)。肌动蛋白丝用DY-554鬼笔环肽标记(红色)。蓝色伪彩=DRAQ5® #4084(DNA荧光染料)。

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Hela cells using LC3A/B Antibody (blue) compared to a nonspecific negative control antibody (red).

流式细胞术分析HeLa细胞,使用的抗体是LC3A/B Antibody(蓝色),及非特异的阴性对照抗体(红色)。



Confocal immunofluorescent analysis of HCT-116 cells, untreated (left) or choroquine-treated (50 uM, overnight; right) using LC3A/B Antibody (green) and β-Catenin (L54E2) Mouse mAb (Alexa Fluor® 555 Conjugate) #5612 (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).


Autophagy is a catabolic process for the autophagosomic-lysosomal degradation of bulk cytoplasmic contents (1,2). Autophagy is generally activated by conditions of nutrient deprivation but has also been associated with a number of physiological processes including development, differentiation, neurodegenerative diseases, infection and cancer (3). Autophagy marker Light Chain 3 (LC3) was originally identified as a subunit of microtubule-associated proteins 1A and 1B (termed MAP1LC3) (4), and subsequently found to contain similarity to the yeast protein Apg8/Aut7/Cvt5 critical for autophagy (5). Three human LC3 isoforms (LC3A, LC3B, and LC3C) undergo post-translational modifications during autophagy (6-9). Cleavage of LC3 at the carboxy terminus immediately following synthesis yields the cytosolic LC3-I form. During autophagy, LC3-I is converted to LC3-II through lipidation by a ubiquitin-like system involving Atg7 and Atg3 that allows for LC3 to become associated with autophagic vesicles (6-10). The presence of LC3 in autophagosomes and the conversion of LC3 to the lower migrating form LC3-II have been used as indicators of autophagy (11).

自噬是自噬溶酶体对其包裹的细胞质内含物进行降解的一种分解代谢过程(1,2)。自噬过程一般是在营养匮乏的条件下被激活,但是也与一些生理过程有关,如发育、分化、神经变性、感染和癌症(3)。自噬微管相关蛋白的轻链3(LC3)最初被认定为是微管相关蛋白1A和1B的一个亚基(被称为MAP1LC3)(4),随后发现该蛋白所包含的与酵母蛋白类似的Apg8/Aut7/Cvt5对于自噬起着至关重要的作用(5)。三种人类LC3亚型(LC3A、LC3B和LC3C)在自噬过程中翻译后被修饰(6-9)。随着合成后LC3羧基末端迅速裂解,产生了胞浆的LC3-I 型。在自噬过程中,通过一个涉及Atg7和Agt3的类泛素体系,LC3-I被脂质化为LC3-II,从而将LC3与自噬小泡联系起来(6-10)。自噬体中LC3的存在,及其向低迁移形式的LC3-II的转化被作为自噬发生的“指示器”(11)。

  1. Reggiori, F. and Klionsky, D.J. (2002) Eukaryot. Cell 1, 11-21.
  2. Codogno, P. and Meijer, A.J. (2005) Cell Death Differ. 12 Suppl 2, 1509-18.
  3. Levine, B. and Yuan, J. (2005) J. Clin. Invest. 115, 2679-88.
  4. Mann, S.S. and Hammarback, J.A. (1994) J. Biol. Chem. 269, 11492-97.
  5. Lang, T. et al. (1998) EMBO J. 17, 3597-607.
  6. Kabeya, Y. et al. (2000) EMBO J. 19, 5720-28.
  7. He, H. et al. (2003) J. Biol. Chem. 278, 29278-87.
  8. Tanida, I. et al. (2004) J. Biol. Chem. 279, 47704-10.
  9. Wu, J. et al. (2006) Biochem. Biophys. Res. Commun. 339, 437-42.
  10. Ichimura, Y. et al. (2000) Nature 408, 488-92.
  11. Kabeya, Y. et al. (2004) J. Cell Sci. 117, 2805-12.

Application References

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