Current Bacterial Gene Encoding Capsule Biosynthesis Protein CapI Contains Nucleotides Derived from Exonization.

Since the proposition of hypothesis, although many studies have shown that most eukaryotic ancestors possessed intron-rich genomes, evidence of intron existence in genomes of ancestral bacteria has still been absent. While not a single intron has been found in all protein-coding genes of current bacteria, analyses on bacterial genes horizontally transferred into eukaryotes at ancient time may provide evidence of intron existence in bacterial ancestors. In this study, a bacterial gene encoding capsule biosynthesis protein CapI was found in the genome of sea anemone, .

[Analysis of gene expression profiles in heart tissues from two breeds of pigs].

To study the expression profiles in the heart tissues of domestic pigs,five un-normalized cDNA libraries from Danish adult female Landrace heart, biceps femoris, aorta, left ventricle tissues and Chinese adult female Erhualian heart tissue were constructed. Totally 35 180 expressed sequence tags (ESTs) were randomly sequenced. Using functional clustering and statistic methods, three gene clusters and 47 genes highly expressed in Landrace heart tissue were found.