E2 enzymes
E2 enzymes (Ubiquitin-conjugating enzymes) perform the second step in the ubiquitination reaction that targets a protein for degradation via the proteasome.The ubiquitination process covalently attaches ubiquitin, a short protein of 76 amino acids, to a lysine residue on the target protein. Once a protein has been tagged with one ubiquitin molecule, additional rounds of ubiquitination form a polyubiquitin chain that is recognized by the proteasome's 19S regulatory particle, triggering the ATP-dependent unfolding of the target protein that allows passage into the proteasome's 20S core particle, where proteases degrade the target into short peptide fragments for recycling by the cell.
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Ketanserin 是一种特异性的5-HT2A 5-羟色胺受体拮抗剂，作用于大鼠和人5-HT2A，Ki为2.5 nM。
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Olanzapine是5-HT2和D2受体高亲和性拮抗剂。
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Avasimibe抑制ACAT，IC50为3.3 μM，也抑制人P450同工酶CYP2C9， CYP1A2和CYP2C19，IC50分别为2.9 μM， 13.9 μM和26.5 μM。
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N6-methyladenosine (m6A)是碱基修饰的腺苷类似物，在天然RNAs中作为稀有核苷。N6-methyladenosine(m6A)是mRNA的第五种碱基。
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Forskolin, a powerful activator of adenylate cyclase (AC), increases cAMP levels in almost all tissues and cells. Forskolin是一种普遍存在的真核细胞腺苷酸环化酶（AC）激活剂，在细胞生理学研究中，常用来提高cAMP水平。
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