Nucleotide variation and molecular structure of the heterochromatic repetitive AluI DNA in the brine shrimp Artemia franciscana.

It has been suggested that DNA bending could play a role in the regulation of gene expression, chromosome segregation, specific recombination and/or DNA packaging. We have previously demonstrated that an AluI DNA family of repeats is the major component of constitutive heterochromatin in the brine shrimp A. franciscana.

Stimulation of growth by insulin in Drosophila embryonic cells in vitro.

For obtaining a better yield of established lines of embryonic Drosophila cells, insulin proved to be a useful substance to be added to the culture medium. 10% of lines became established, showing a predominantly diploid chromosome number.