RNA polymerase II from larvae of the brine shrimp, Artemia salina, was highly purified by two cycles of DEAE-cellulose chromatography followed by centrifugation through discontinuous sucrose gradients. Gradient fractions were subjected to elctrophoresis is polyacrylamide gels containing sodium dodecyl sulfate. The subunit structure of RNA polymerase II was determined by quantitative comparison ...

Two new secondary metabolites, namely, pinodiketopiperazine A (1) and 6,7-dihydroxy-3-methoxy-3-methylphthalide (2), along with alternariol 2,4-dimethyl ether (3) and L-5-oxoproline methyl ester (4), which were isolated from a natural source for the first time but have been previously synthesized, were characterized from the marine sediment-derived fungus Penicillium pinophilum SD-272. In addit...

S EXUAL mosaics have been reported in three genera of Crustacea. A bilateral mosaic of Carcinus was found to have a testis on one side and a mixed gonad on the other (VEILLET 1945). Gynandromorphs with a testis and ovary have been reported in Homarus (see review by CHACE and MOORE 1959) and in the cladoceran, Simocephalus (BANTA, WOOD, BROWN and INGLE 1939). No intersex or mosaic of Artemia has...

The following factors were measured for extracellular haemoglobins of Artemia salina: a minimal molecular weight of globin chain per haem group (based on the iron and haem contents), the absorption coefficients, the absorption spectra of various derivatives and the amino acid compositions. These were compared with those of the haemoglobins of other invertebrates. Three Artemia haemoglobins (I, ...

This text presents complementary data corresponding to pharmacological and toxicological characterization of N-(2,6-dichlorophenyl)-2-(4-methyl-1-piperidinyl)acetamide (LIA) compound. These data support our research article entitled "Pharmacological profile of N-(2,6-dichlorophenyl)-2-(4-methyl-1-piperidinyl)acetamide, a novel analog of lidocaine" Déciga-Campos M., Navarrete-Vázquez G., López-M...

Eggs of Artemia salina L., the brine shrimp, are easily obtainable in large quantities. Ecdysis takes place in two stages: (a) extrusion of the inner membrane, and (b) ecdysis of the nauplius from that membrane. The conditions which allow for the former are much more varied than those for the latter. Nauplii form in only solutions of a few sodium salts; and, in Mg, Ca, and Sr salts, potassium i...