Related Experiment Video
Updated: Aug 14, 2026

Improved UPLC-UV Method for the Quantification of Vitamin C in Lettuce Varieties (Lactuca sativa L.) and Crop Wild Relatives (Lactuca spp.)
Published on: June 30, 2020
Folic acid compounds in romaine lettuce
Abstract:
The composition of folate coenzymes in romaine lettuce was studied. Lettuce extract was purified on QAE-Sephadex A-25 and folate compounds were separated into a monoglutamate fraction and a polyglutamate fraction by chromatography on Sephadex G-15. Both the mono- and poly-glutamate fractions were resolved on DEAE-cellulose. Positive identification of DEAE peaks was made by further cochromatography with high specific activity radioactive marker folate compounds and with differential microbiological assay. The distribution of folate compounds in lettuce is as follows: 32% 5-CH3-H4PteGlu; 1% 5-CHO-H4PteGlu; 3% 5-CHO-H4PteGlu4; 9% 5-CH3-H4PteGlu4; 13% 5-CHO-H4PteGlu5; and 31% 5-CH3-H4PteGlu5.
More Related Videos
06:21Multi-Gene Single Nucleotide Polymorphism Detection in Gastric Cancer Based on Ion Semiconductor Sequencing Platform
Published on: May 10, 2024
03:19Modifying Levels of Maternal Dietary Folic Acid or Choline to Study the Impact of Deficiencies on Offspring Health Outcomes
Published on: June 28, 2024
Related Concept Videos
Drugs for Treatment of Ulcerative Colitis in IBD
Vitamins
Microbes in the Production of Fermented Foods