1442-110沃特曼定量滤纸GR 42 11CM 100/

如何做好 Southern 杂交？

液（8 cm × 8 cm 的膜加 5 mL 即可），将膜的背面贴紧杂交瓶壁，正面朝向杂交液。放入 42 ℃ 杂交炉中，使杂交体系升到 42 ℃。取经超声粉碎的鲑鱼精 DNA（已溶解在水或 TE 中）100 ℃ 加热变性 5 min，迅速加到杂交瓶中，使其浓度达到 100 μg/mL。继续杂交 4 hr。鲑鱼精 DNA 的作用是封闭 NC 膜上没有 DNA 转移的位点，降低杂交背景、提高杂交特异性。2．杂交倒出预杂交的杂交液，换入等量新的已升温至 42 ℃ 的杂交液，同样加入变性的鲑鱼精 DNA。将探针

Mapping Protein Distributions on Polytene Chromosomes by Immunostaining

. A small block made of polyvinyl chloride (2.5 x 2.5 x 1.5 cm) is attached to a flexible Teflon ribbon as shown. The block should hang ~2-3 mm above the plane of the holding block (also made of polyvinyl chloride). A piece of filter paper (i.e., Whatman 3MM

Analys of Genomic DNA by Southe

in prehybridization solution. (2 hours) Place membrane in hybridization bottle with 20 ml (min. 100 µl/cm2 ) of prehybridization buffer (use nylon mesh as a spacer before rolling). Incubate in hybridization oven at 42℃ for 1-2 hours . Alternatively