Before I write today’s post on the genome organization, I would like to tell about a commercial high rise proposed to be built in the Middle East. Designed by German architect Eckhard Gerber, this 68-story tower will use sun, wind and water to create its own energy and electricity. The tower would be requiring 60% less energy than other comparable buildings, and produce zero CO2 emissions. You can read the whole story here. via: Inhabitat
Nuclear genomes contain both single-copy sequences and repetitive DNA. In multicellular eukaryotes, approximately 25-50% protein-coding genes are present only once in the haploid genome. They are termed single-copy or solitary genes. One of the well-studied examples of a solitary protein protein-coding genes is chicken lysozyme. The gene is 15 Kb long DNA sequence and has 4 exons and 3 introns. The lysozyme enzyme cleaves the polysaccharide component of the bacterial cell wall, and is abundantly found in chicken egg-white protein. The enzyme is also found in human tears. Lysozyme is one of the examples of solitary genes, many other genes are present in single copy in the haploid genome.