Immunoelectron microscopy is used for localizing proteins in thin sections at the electron microscope level.

TLS Online TPP Program

#Id: 3686

#Unit 2. Cellular Organization

Pathogenicity islands are a characteristic feature of pathogenic bacteria genomes.These are large regions (10 to 200 kb) that are present in the genomes of pathogenic species but absent from the genomes of nonpathogenic variants of the same or related species. 

TLS Online TPP Program

#Id: 3687

#Unit 2. Cellular Organization

Pathogenicity islands GC content often differs from that of the rest of the genome, and it is likely that these regions are spread among bacteria by a process of horizontal transfer.

TLS Online TPP Program

#Id: 3688

#Unit 2. Cellular Organization

Bacillus anthracis has two large plasmids (extrachromosomal DNA molecules), one of which has a pathogenicity island that includes the gene encoding the anthrax toxin.

TLS Online TPP Program

#Id: 3689

#Unit 2. Cellular Organization

TLS Online TPP Program

#Id: 3690

#Unit 2. Cellular Organization

coli have average polypeptide lengths 317 amino acids, S. cerevisiae- 484 and C. elegans - 442 have average polypeptide lengths

TLS Online TPP Program

#Id: 3691

#Unit 2. Cellular Organization

The sum of the number of unique genes and the number of gene families is an estimate of the number of types of genes.

The minimum size of the proteome can be estimatedfrom the number of types of genes.