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Modulation of the chromatin structure plays an important role in the regulation of transcription in eukaryotes. The nucleosome, made up of four core histone proteins (H2A, H2B, H3 and H4), is the primary building block of chromatin. The N-terminal tail of core histones undergoes different posttranslational modifications including acetylation, phosphorylation and methylation. These modifications occur in response to cell signal stimuli and have a direct effect on gene expression. In most spec

缺氧誘導因子1Alpha不僅對于機體在缺氧條件下維持正常的生理功能具有特別重要的意義,并在腫瘤的生長以及神經細胞凋亡等病理過程中起重要作用. HIF1 alpha能調節許多下游基因的表達水平. 哺乳動物細胞在低氧壓力條件下出現HIF。HIF是一種轉錄因子，對細胞的缺氧起穩定作用。

缺氧誘導因子1Alpha不僅對于機體在缺氧條件下維持正常的生理功能具有特別重要的意義,并在腫瘤的生長以及神經細胞凋亡等病理過程中起重要作用. HIF1 alpha能調節許多下游基因的表達水平. 哺乳動物細胞在低氧壓力條件下出現HIF。HIF是一種轉錄因子，對細胞的缺氧起穩定作用。

缺氧誘導因子1Alpha不僅對于機體在缺氧條件下維持正常的生理功能具有特別重要的意義,并在腫瘤的生長以及神經細胞凋亡等病理過程中起重要作用. HIF1 alpha能調節許多下游基因的表達水平. 哺乳動物細胞在低氧壓力條件下出現HIF。HIF是一種轉錄因子，對細胞的缺氧起穩定作用。

缺氧誘導因子1Alpha不僅對于機體在缺氧條件下維持正常的生理功能具有特別重要的意義,并在腫瘤的生長以及神經細胞凋亡等病理過程中起重要作用. HIF1 alpha能調節許多下游基因的表達水平. 哺乳動物細胞在低氧壓力條件下出現HIF。HIF是一種轉錄因子，對細胞的缺氧起穩定作用。

The protein encoded by this gene is a member of the keratin family. The keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into cytokeratins and hair keratins. The type I cytokeratins consist of acidic proteins which are arranged in pairs of heterotypic keratin chains. Unlike its related family members, this smallest known acidic cytokeratin is not paired with a basic cytokeratin in epithelial cells. It is specifically e