HIV contains a protein that is called "reverse transcriptase" which is crucial for viral replication inside of T-cells. ... The virion contains two copies of the RNA genome and three key enzymes: protease, integrase, and reverse transcriptase. ... These individuals possess a homozygous mutation of the CCR5 gene, which prevents the CCR5 receptor from being presented at the cell surface. ... Next, the DNA copy of the viral genome is readily transported to the nucleus and subsequently integrated into the host cell genomic DNA by the integrase enzyme. Once integration is completed, viral genes ca...

• Word Count: 1861
• Approx Pages: 7
• Has Bibliography
• Grade Level: Undergraduate

Osseous tissue contains specialized cells, cell products, and a fluid matrix. ... These canaliculi contain cytoplasmic extensions of the osteocytes and their extensions provide a route for the diffusion of nutrients and waste products. ... Since these are gene products, they need protein producing machinery to complete their function. ... This polymeric protein is initially secreted in the form of a precursor, which contains peptide extensions . the propeptides are proteolytically removed. ... Compared with osteoblasts, osteocytes are smaller and have fewer numbers of organelles, although the...

• Word Count: 5684
• Approx Pages: 23
• Has Bibliography
• Grade Level: Undergraduate