Sex pheromone and related compounds in the Ishigaki and Okinawa strains of the tussock moth Orgyia postica (Walker) (Lepidoptera: Lymantriidae).

Two distinct electroantennographycally active (EAG-active) components, A and B, and a weakly active component C were found in a solvent extract from virgin females of the Ishigaki strain of the tussock moth, Orgyia postica (Walker). Components A, B, and C were found in the extract of the females at 4.0, 0.

Identification of a sex pheromone component of the geometrid moth Milionia basalis pryeri.

A single component in extracts of virgin female Milionia basalis pryeri moths elicited responses from male moth antennae. This compound (ca. 7 ng/female) was identified as (Z,Z)-(3S,4R)-3,4-epoxynonadeca-6,9-diene by GC-MS and NMR analyses, microchemical reactions, and comparative chiral HPLC.

Purification and characterization of O-Acetylserine sulfhydrylase of Corynebacterium glutamicum.

We highly purified O-acetylserine sulfhydrylase from the glutamate-producing bacterium Corynebacterium glutamicum. The molecular mass of the purified enzyme was 34,500 as determined by SDS-polyacrylamide gel electrophoresis, and 70,800 as determined by gel filtration chromatography. It had an apparent Km of 7.

Synthesis and characterization of hexadecadienyl compounds with a conjugated diene system, sex pheromone of the persimmon fruit moth and related compounds.

Hexadecadien-1-ol and the derivatives (acetate and aldehyde) with a conjugated diene system have recently been identified from a pheromone gland extract of the persimmon fruit moth (Stathmopoda masinissa), a pest insect of persimmon fruits distributed in East Asia. The alcohol and acetate showed their base peaks at m/z 79 in a GC-MS analysis by electron impact ionization, but the aldehyde produced a unique base peak at m/z 84, suggesting a 4,6-diene structure. To confirm this inference, four geometrical isomers of each 4,6-hexadecadienyl compound were synthesized by two different routes in which one of two double bonds was furnished in a highly stereoselective manner.

Characterization of geometrid sex pheromones by electrospray ionization time-of-flight mass spectrometry.

The utility of liquid chromatography combined with time-of-flight mass spectrometry (LC/TOFMS) was demonstrated for studies on chiral unsaturated epoxy compounds, sex pheromones produced mainly by female moths in the family Geometridae. By electrospray ionization (ESI), each synthetic epoxyalkadiene derived from (Z,Z,Z)-3,6,9-triene with a C(18)-C(23) straight chain showed three ion series, [M + NH(4)](+), [M + H](+) and [M - OH](+), with high resolution and good sensitivity, indicating its molecular formula. In addition to these, characteristic fragment ions at m/z M - 57 and M - 71 for the 3,4-epoxides and at m/z M - 123 and 123 for the 9,10-epoxides were detected, whereas the 6,7-epoxides did not produce fragment ions that reflected their structures.

Identification of epoxyhenicosadiene and novel diepoxy derivatives as sex pheromone components of the clear-winged tussock moth Perina nuda.

Four EAG-active components (A-D) were found in the solvent extract of virgin females of the clear-winged tussock moth, Perina nuda. The most abundant component (B, ca. 250 ng/female) was identified as (3Z,6S,7R,9Z)-6,7-epoxyhenicosa-3,9-diene by GC-MS analyses of the extract, chemical derivatization, and comparative chiral HPLC.