Phe-p-toluidid | 21171-98-2

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: Phe-p-toluidid
• 英文别名: phenylalanine p-toluidide；Phenylalanin-p-toluidid；2-amino-N-(4-methylphenyl)-3-phenylpropanamide
• CAS: 21171-98-2
• 化学式: C₁₆H₁₈N₂O
• 分子量: 254.332
• InChiKey: NBYFHVJOHIUSPW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  19
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.19
• 拓扑面积：
  55.1
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  N-Benzoyl-dithiocarbaminsaeure-methylester 、 Phe-p-toluidid 在 氯仿 作用下， 生成 N-benzoylthiocarbamoyl-phenylalanine p-toluidide
  参考文献：
  名称：

  Toward Efficient Analysis of Mutations in Single Cells from Ethanol-Fixed, Paraffin-Embedded, and Immunohistochemically Stained Tissues

  摘要：

  only a few studies have demonstrated successful molecular analysis after whole genome amplification using single cells dissected from paraffin-embedded tissues. The results in these studies were limited by low-amplification efficiency and high rates of allele dropout. In the present study, the amplification rate using a thoroughly modified primer extension and preamplification-PCR protocol was improved significantly for single cells microdissected from paraffin-embedded and immunohistochemically stained tissues. Tissue fixation with ethanol (85%) and the addition of 0.2 mmol/L EDTA helped to achieve an amplification rate between 67% (segments 200 to 400 bp) and 72% (segments <200 bp). Normal tissue sections were immunohistochemically double stained for overabundance of p53 protein and proliferating cell nuclear antigen. Microdissection of single cells was performed with a manual micromanipulator equipped with a Tungsten needle. Sequence analysis of the TP53 gene was performed after improved primer extension preamplification-PCR and multiplex PCR from single microdissected cells. The rate of allele dropout was at least 68%. These technical advances facilitate routine mutation analysis using a single cell or a few cells microdissected from routinely processed paraffin-embedded normal and tumor tissues. Allele dropout still represents a serious problem in single-cell mutation analysis, especially in samples with limited template DNA and prone to DNA damage.

  DOI：

  10.1038/labinvest.3780437

文献信息

• Toward Efficient Analysis of Mutations in Single Cells from Ethanol-Fixed, Paraffin-Embedded, and Immunohistochemically Stained Tissues
  作者：Ernst Heinmöller、Qiang Liu、Yuan Sun、Gudrun Schlake、Kathleen A Hill、Larry M Weiss、Steve S Sommer

  DOI：10.1038/labinvest.3780437

  日期：2002.4

  only a few studies have demonstrated successful molecular analysis after whole genome amplification using single cells dissected from paraffin-embedded tissues. The results in these studies were limited by low-amplification efficiency and high rates of allele dropout. In the present study, the amplification rate using a thoroughly modified primer extension and preamplification-PCR protocol was improved significantly for single cells microdissected from paraffin-embedded and immunohistochemically stained tissues. Tissue fixation with ethanol (85%) and the addition of 0.2 mmol/L EDTA helped to achieve an amplification rate between 67% (segments 200 to 400 bp) and 72% (segments <200 bp). Normal tissue sections were immunohistochemically double stained for overabundance of p53 protein and proliferating cell nuclear antigen. Microdissection of single cells was performed with a manual micromanipulator equipped with a Tungsten needle. Sequence analysis of the TP53 gene was performed after improved primer extension preamplification-PCR and multiplex PCR from single microdissected cells. The rate of allele dropout was at least 68%. These technical advances facilitate routine mutation analysis using a single cell or a few cells microdissected from routinely processed paraffin-embedded normal and tumor tissues. Allele dropout still represents a serious problem in single-cell mutation analysis, especially in samples with limited template DNA and prone to DNA damage.