The 21 kDa guanine-nucleotide binding proteins (K-Ras, H-Ras and N-Ras) cycle between active (GTPbound) and inactive (GDP-bound) forms (1). Receptor tyrosine kinases and G-protein-coupled receptors activate Ras, which then stimulates the Raf-MEK-MAPK pathway (2-4). GTPase-activating proteins (GAP) normally facilitate the inactivation of Ras. However, in 30% of human tumors, point mutations in Ras prevent the GAP-mediated inhibition of this pathway (5). The most common oncogenic Ras mutation found in tumors is Gly12 to Asp (G12D), which prevents Ras inactivation, possibly by increasing the overall rigidity of the protein (5,6).
StressMarq Biosciences Inc. 在2007年成立于加拿大維多利亞,是一家生物科技公司,專門從事試劑與試劑盒研究,服務(wù)范圍遍及3158多個國家。 StressMarq公司的核心技術(shù)領(lǐng)域為細胞應(yīng)激(尤其是熱休克蛋白(HSP)領(lǐng)域,領(lǐng)先全球),離子通道,載體研究,同時在神經(jīng)科學(xué)領(lǐng)域推出特有的具有生物活性的Tau蛋白與A-突觸核蛋白。產(chǎn)品領(lǐng)域涉及到:細胞凋亡、細胞信號、通路和轉(zhuǎn)運、細胞器標(biāo)志物、熱休克、神經(jīng)生物學(xué)、神經(jīng)科學(xué)、氧化應(yīng)激、磷酸化運輸?shù)取3颂峁┯糜谶M一步研究的相關(guān)工具外,Str