Cell cultures obtained from immortal cell. These cell line carry out for the carcinogenic cell. These cultures generally used for the laboratory purpose to avoid cell harvesting from the host cell. This kind of cell can be culture and store for the future generations. A cell can undergo 50 divisions and it become inactive, so cell lines are useful for research purpose. Journal Article is sometimes called a Scientific Article, a Peer-Reviewed Article, or a Scholarly Research Article. Together, journal articles in a particular field are often referred to as The Literature. Journal articles are most often Primary Research Articles. However, they can also be Review Articles. These types of articles have different aims and requirements. Sometimes, an article describes a new tool or method. Because articles in scientific journals are specific, meticulously cited and peer-reviewed, journal databases are the best place to look for information on previous research on your species. Without a background in the field, journal articles may be hard to understand - however, you do not need to understand an entire article to be able to get valuable information from it.