HOE-S 785026 is a Hoechst series dye that is commonly used for nuclear labeling staining of living cells. Hoechst dye can be used to monitor cell viability by tracking changes in its emission spectrum0. As slightly groove-binding DNA stains with AT selectivity, Hoechst dyes are able to bind to all nucleic acids, but they show greater fluorescence enhancement for AT-rich double-stranded DNA strands compared to GC-rich strands [ 1]. This property has been used to identify Q bands in chromosomes, which are AT base pair-rich regions that fluoresce brightly when stained with quinacrine dye [2]. The fluorescence intensity of Hoechst dye increases as the pH of the solution increases.
HOE-S 785026是Hoechst系列染料，常用于活细胞的细胞核标记染色。Hoechst染料可被用于通过跟踪其发射光谱的变化来监测细胞活力0。作为具有AT选择性的轻微凹槽结合DNA染色剂，Hoechst染料能够与所有核酸结合，但与富含GC的链相比，它们对富含AT的双链DNA链显示出更大的荧光增强[1]。该特性已被用于鉴定染色体中的Q条带，这些染色体是富含AT碱基对的区域，当用奎纳克林染料染色时会发出明亮的荧光[2]。Hoechst染料的荧光强度随着溶液的pH的增加而增加。
References:
[1]. Portugal J, Waring MJ. Assignment of DNA binding sites for 4′, 6-diamidine-2-phenylindole and bisbenzimide (Hoechst 33258). A comparative footprinting study. Biochimica et Biophysica Acta (BBA)-Gene Structure and Expression. 1988 Feb 28;949(2):158-68.
[2]. Weisblum B, Haenssler E. Fluorometric properties of the bibenzimidazole derivative Hoechst 33258, a fluorescent probe specific for AT concentration in chromosomal DNA. Chromosoma. 1974 Sep;46(3):255-60.