Raul A. Saavedra

Learn More
Mice homozygous for the autosomal recessive mutation shiverer (shi) lack myelin basic protein (MBP) and exhibit a distinct behavioral pattern including tremors (shivering), convulsions, and early death. We have previously demonstrated that shiverer mice have a partial deletion in the gene encoding MBP. We now have introduced the wild-type MBP gene into the(More)
We have developed a general two-step method for obtaining peptide fragments for sequence analysis from picomole quantities of proteins separated by gel electrophoresis. After separation by one- or two-dimensional polyacrylamide gel electrophoresis, proteins are electrophoretically transferred (electroblotted) onto nitrocellulose, the protein-containing(More)
Measurements at various temperatures of the linking number of yeast 2 microns plasmid DNA in wild-type cells and in cells bearing mutations in the DNA topoisomerase I and II genes show that bulk 2 microns plasmid minichromosome are maintained in a relaxed state by the combined action of topoisomerases I and II. Bulk 2 microns minichromosomes are not under(More)
The two major structural proteins in the shark CNS are similar to the structural proteins, Po and myelin basic protein (MBP), found in the mammalian peripheral nervous system (PNS). Shark Po is 46% similar to its mammalian counterpart. The extracellular domain of shark Po also appears to be organized as an immunoglobulin-like domain that mediates homotypic(More)
To better understand the cell type-specific and coordinated regulation of the myelin protein genes, we cloned and sequenced the shark myelin basic protein (MBP) promoter. An alignment of the shark sequence with the corresponding mouse sequence showed striking similarities. These similarities, together with the results from expression experiments, define two(More)
The realization that soluble mediators of immune function, termed cytokines, can interact with nonimmunological cells has led to new insights into the role of the immune system in regulating cell growth and differentiation of other organ systems. The additional finding that dysregulation of these interactions can lead to a variety of clinical disorders has(More)
To understand the role of post-translational modifications on the structure and function of osteopontin, a secreted glycosylated phosphoprotein, we expressed mouse osteopontin in E. coli as a fusion protein with glutathione-S-transferase (GST). The purified fusion protein was cleaved by factor Xa generating GST (26 kDa) and recombinant osteopontin (60 kDa).(More)