产品组分及规格

背景

Histone H3 is one of the DNA-binding proteins found in the chromatin of all eukaryotic cells. H3 along with four core histone proteins binds to DNA forming the structure of the nucleosome. Histones play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. Post translationally, histones are modified in a variety of ways to either directly change the chromatin structure or allow for the binding of specific transcription factors. The N-terminal tail of histone H3 protrudes from the globular nucleosome core and can undergo several different types of post-translational modification that influence cellular processes. These modifications include the covalent attachment of methyl or acetyl groups to lysine and arginine amino acids and the phosphorylation of serine or threonine.

石蜡包埋组织的免疫组织化学方案

1. 脱蜡水化

石蜡切片置于新鲜二甲苯中浸泡脱蜡3次，每次15 min；依次置于不同浓度（100%、95%、90%、80%、70%）乙醇浸泡各5 min，再置于蒸馏水洗涤5 min，重复3次。

2. 抗原修复

沸水浴修复：将100×抗原修复缓冲液（试剂2）用蒸馏水稀释成1×抗原修复缓冲液，放入修复盒中并提前加热至95-100℃（注意盖好以防液体蒸发），然后将切片放入修复盒中，在沸水浴环境中保持外沸状态15 min，室温自然冷却；用PBS缓冲液（试剂1，将干粉溶解在2L蒸馏水中）清洗5 min，重复3次。

3. 阻断内源性过氧化物酶

用吸水纸吸去玻片上多余的液体，用免疫组化笔在组织周围画圈，加入2-4滴内源性过氧化物酶阻断剂（试剂3），室温下置于湿盒中孵育15 min，用PBS洗涤5 min，重复3次。

4. 血清封闭

用吸水纸吸去玻片上多余的液体，加入2-4滴