RESUMO
Analytical and preparative isotachophoresis has been carried out using amino acids and peptides as discrete spacers in contrast to the usually employed continuous mobility spectrum Ampholine. Analytical isotachoresis in free solution, using the LKB Tachophor, demonstrated the separation of human serum into distinct mobility subgroups, n spacers giving rise to n + 1 protein subgroups. Preparative fractionation on polyacrylamide gel was carried out on the LKB Uniphor using threonine and glycine as spacers. Immunoelectrophoretic analysis showed that eight out of ten proteins assayed were clearly resolved in the three subgroups obtained, thus demonstrating the sharpness of isotachophoretic resolution.
Assuntos
Aminoácidos , Eletroforese das Proteínas Sanguíneas/métodos , Proteínas Sanguíneas/classificação , Eletroforese em Gel de Poliacrilamida , Humanos , Imunoeletroforese , PeptídeosRESUMO
An electrophoretic technique, isotachophoresis, has been adapted for qualitative and quantitative analysis of metabolites in human muscle tissue. Metabolite concentrations exceeding 0.1 nmol X kg-1 wet muslce could be determined in 5-10 mg muscle biopsy samples generally in good agreement with conventional analytical methods.
