The 2,6-dimethoxy-p-benzoquinone (2,6DMBQ) derived from different plant species is of special interest. The wheat (Triticum vulgaris) is one of the largest known natural sources of these compounds. These compounds occur in glucoside form, and are located in the embryo. In the present work we aimed at developing chromatographic method for precise, sensitive and reliable analysis with high stabil...

The translocation of prepromelittin (pPM) across mammalian endoplasmic reticulum was studied in both wheat germ and reticulocyte lysate. In the wheat germ system, signal recognition particle (SRP) caused a transient arrest in the synthesis of pPM. This was indicated by a slowdown in the rate of synthesis of pPM in the presence of SRP. The arrest was specific, dependent on the concentration of S...

The phosphoglyceric acid mutases from Baker’s yeast and rabbit skeletal muscle have been crystallized or highly purified in this laboratory, and a comparative study of the kinetic and molecular properties has been conducted (l-3). The phosphoglyceric acid mutases from these two sources as well as from many others (2, 4) are stimulated by catalytic amounts of 2,3-diphosphoglyceric acid, as was o...

A ribonuclease protection assay was used to determine the equilibrium dissociation constants (Kd) for the binding of various RNAs by wheat germ EF-1alpha.GTP. Aminoacylated fully modified tRNAs and unmodified tRNA transcripts of four specificities (valyl, methionyl, alanyl, and phenylalanyl) from higher plants or Escherichia coli were bound with Kd values between 0.8 and 10 nM. A valylated 3'-f...

The 2',3'-cyclic nucleotide 3'-phosphodiesterase which hydrolyzes nucleoside 2',3'-cyclic phosphates (N greater than p) to nucleoside 2'-phosphates has been purified 16,000-fold to near homogeneity from wheat germ. The purified enzyme is a single polypeptide with a molecular weight of 23,000-24,000. It has a pH optimum of 7.0. The apparent Km values for A greater than p, G greater than p, C gre...

An unusual class of wheat germ tRNAs has been isolated which completely lacks ribothymidine (rT) and contains an unmodified uridine in its place. We discuss here the isolation, identification and properties of these tRNAs. The rT-lacking tRNAs of wheat germ are essentially limited to the glycine isoacceptors (a minimum of five identifiable species), three threonine and at least, one tyrosine tR...

Fernitin-conjugated plant lectins of varying sacchanide specificities were used to characterize oligosacchanides present on the surface of mouse mammary tumor virus (MMTV) produced in cells of mammary tumors of mice of C3H/He/Tex, A/Dm, and RlII/Dm strains. Mouse mammary tumor (MMT) cells grown on discs of FEP Teflon were labeled in situ with fennitin conjugates of concanavalin A specific for a...