NOTES: Two-Dimensional Thin-Layer Chromatography for Amino Acid Analysis of Bacterial Cell Walls

Abstract
Good separation of bacterial cell wall amino acids, including the isomers of diaminopimelic acid, was obtained by 2-dimensional TLC using commercial cellulose-coated Al sheets with isopropanol-acetic acid-water (75:10:15, vol/vol) and methanol-pyridine-10 N hydrochloric acid-water (64:8:2:14, vol/vol) as the 1st and 2nd solvents, respectively. [This study relates to bacterial chemotaxonomy.].