TY - JOUR A1 - Lodemann, Edgar A1 - Niedenthal, Ilse A1 - Wacker, Adolf T1 - Influence of pH on the stability of some aminoacyl transfer ribonucleic acids and their elution pattern in chromatography on columns of methylated albumin adsorbed on kieselguhr T2 - Zeitschrift für Naturforschung, B N2 - At pH 5.3 and 4.5 the half life of valyl-, threonyl-, leucyl- and seryl-tRNA from E. coli K 12 is significantly higher than at pH 6.8. While no changes were observed in the MAK elution patterns of valyl- and threonyl-tRNA, leucyl-tRNA was eluted in two peaks at pH 6.8 and 5.3 and in one broad peak at pH 4.5. Seryl-TRNA - two peaks at pH 6.8 - was separated in three peaks at pH 5.3 and 4.5. Rechromatography of these peaks at the other pH suggests the existence of at least four species of seryl-tRNA in E. coli K 12. Y1 - 2014 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/71466 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-714666 SN - 1865-7117 SN - 0932-0776 VL - 25.1970 IS - 8 SP - 845 EP - 848 PB - Verlag der Zeitschrift für Naturforschung CY - Tübingen ER -