This video set explains protein sythesis in detail.Protein synthesis is the creation of proteins using DNA and RNA. Proteins can often be synthesized directly from genes by translating mRNA. When a protein is harmful and needs to be available on short notice or in large quantities, a protein precursor is produced. A proprotein is an inactive protein containing one or more inhibitory peptides that can be activated when the inhibitory sequence is removed by proteolysis during posttranslational modification. A preprotein is a form that contains a signal sequence (an N-terminal signal peptide) that specifies its insertion into or through membranes; i.e., targets them for secretion.[1] The signal peptide is cleaved off in the endoplasmic reticulum.[1]. Preproproteins have both sequences (inhibitory and signal) still present. Text Reff: Wiki
Conversations
