Measurement of l-histidine ammonia-lyase activity and urocanic acid content of human skin
β Scribed by A.E. Whitfield; Jean Shepherd
- Book ID
- 115818704
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 623 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-8981
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π SIMILAR VOLUMES
The urocanic acid content of the skin was measured photometrically in a large number of normal and histidinemic infants. A very high content was demonstrated in the normal newborn infants, followed by a rapid decrease throughout early infancy. In contrast, 36 measurements in 17 infants with histidin
UV-B radiation suppresses cell-mediated immunity. Histidine forms trans-urocanic acid (truns-UCA) enzymatically in the stratum comeum. Photoisomerization of trans-UCA to cis-urocanic acid (cis-UCA) has been proposed for the initiation of an immunosuppressive process. Many microorganisms described in