Begin is the common term: to begin knitting a sweater. Commence is a more formal word, often suggesting a more prolonged or elaborate beginning: to commence proceedings in court. Initiate implies an active and often ingenious first act in a new field: to initiate a new procedure.
Structure of the trp operon. The trp operon is an operon â a group of genes that are used, or transcribed, together â that codes for the components for production of tryptophan. The trp operon is present in many bacteria, but was first characterized in Escherichia coli.The operon is regulated so that when tryptophan is present in the environment, the genes for tryptophan synthesis are not expressed.It was an important experimental system for learning about gene regulation, and is commonly used to teach gene regulation.he trp operon is present in many bacteria, but was first characterized in Escherichia coli. The operon is regulated so that when tryptophan is present in the environment, the genes for tryptophan synthesis are not expressed.
Regulation of Red Blood Cells. Now that we have discussed the developmental process of RBC. Lets us look at how RBC growth is regulated. The production of RBCs is regulated by a hormone called erythropoietin (EPO). EPO is produced in the kidney by peritubular cells that can detect tissue oxygen content. When the oxygen that is delivered to the kidneys is decreased as a result of say, anemia, these cells in the kidney instantly increase the production and release of EPO. In response to the increased synthesis of EPO, committed stem cells in the bone marrow are increased thus producing more RBC. The increased RBC production will lead to an increased oxygen carrying capacity of the blood.