Publications by authors named "A Spyridakis"

A full-term female newborn was transferred to our neonatal intensive care unit (NICU) on day two of life for hypotonia. Physical examination was significant for overriding sutures, displaced small anterior fontanelle, axial hypotonia, extremity hypertonia, and slow deep tendon reflexes. She was also noted to have stridor with crying but had unlabored breathing without oxygen requirements and a normal heart examination.

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Avulsion fibular head fractures are rare. There is only one reference of bilateral fibular fractures after epileptic seizure. We aim to present the mechanism and the treatment of this rare injury.

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We have established the nucleotide sequence of the wild-type and that of a trans-acting mutant located in the third (bi3) intron of the Saccharomyces cerevisiae mitochondrial cytochrome b gene. The intron, 1691 base-pairs long, has an open reading frame 1045 base-pairs long, in phase with the preceding exon and the mutation replaces the evolutionarily conserved Gly codon of the second consensus motif by an Asp codon and blocks the formation of mature cytochrome b mRNA. Splicing intermediates of 5300 and 3900 bases with unexcised bi3 intron and a characteristic novel polypeptide (p50), the size of which corresponds to the chimeric protein encoded by upstream exons and the bi3 intronic open reading frame (ORF), accumulate in this and other bi3 splicing-deficient mutants.

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Yeast mitochondria isolated from two different wild type strains (gal+ and gal-), whether grown on galactose or glucose, synthesize all mitochondrial polypeptides with similar efficiencies and in proportions approximating those detected in vivo. Mitochondria isolated from mit- mutants synthesize in vitro a mutant pattern of mitochondrial proteins, indistinguishable from the in vivo products. The mutant pattern is restored to the wild type one in mitochondria isolated from pseudorevertant strains carrying an additional nuclear (nam3-1 and R705) or mitochondrial (mim3-1) informational suppressor gene.

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