In some families of flowering plants, a single self-incompatibility (S) locus prevents the fertilization of flowers by pollen from the same plant. Self-incompatibility of this type involves the interaction of molecules produced by the S locus in pollen with those present in the female tissues (pistil). Until recently, the pistil products of the S locus were known in only two families, the Brass...

Mitochondrial-nuclear incompatibility has a major role in reproductive isolation between species. However, the underlying mechanism and driving force of mitochondrial-nuclear incompatibility remain elusive. Here, we report a pentatricopeptide repeat-containing (PPR) protein, Ccm1, and its interacting partner, 15S rRNA, to be involved in hybrid incompatibility between two yeast species, Saccharo...

In the first report on the chemical structure of a nonmammalian LH-RH, chicken hypothalamic LH-RH was demonstrated to be [Gln8]LH-RH [2-4]. However, these studies and subsequent reports [7,8] did not totally exclude the possibility of a reverse sequence of the two amino acids Leu-Gln. In view of the recently described structure of salmon brain LH-RH as [Trp7,Leu8]LH-RH [9], we undertook to conf...

Analysis of nucleotide sequences that regulate the expression of self-incompatibility in flowering plants affords a direct means of examining classical hypotheses for the origin and evolution of this major feature of mating systems. Departing from the classical view of monophyly of all forms of self-incompatibility, the current paradigm for the origin of self-incompatibility postulates multiple...

Forty-one stocks from 30 Drosophila species were surveyed for Wolbachia infection using PCR technology. D. sechellia and two strains of D. auraria were found to be infected and were tested for the expression of cytoplasmic incompatibility, along with D. ananassae and D. melanogaster strains, which are already known to be infected. D. ananassae and D. melanogaster show levels of incompatibility ...

background: when fetal red cells enter the maternal circulation from placenta, an event would be happened that is described as feto-maternal hemorrhage (fmh). this life-threatening condition could be detected by using rbc antigens (surface antigens and intracellular antigens). therefore, the measurement of fetal rbc in an artificial model would be useful to calculate fmh and consequently the do...

constituent of foetal serum, but it virtually disappears from the circulation very soon after birth and is not detectable in normal adults. The only conditions where cx1FP has been found in the sera of adult humans in significant quantities are primary hepatocellular cancer of the liver and teratocarcinomas. It has been shown that the demonstration of x1FP in the serum of adult patients can be ...

In the 1940s and the 1950s, severe neonatal hyperbilirubinemia and kernicterus were most often encountered with hemolytic disease of newborn (HDN), which occurs most often as a result of the incompatibilities of the Rh and ABO blood groups. With the advent of prenatal testing, maternal Rh°(D) immunoglobulin, phototherapy, and exchange transfusion, the incidence of severe hyperbilirubinemia dras...