The main component of connective tissue. It is the structural protein, which make up the 25-35 % of the body protein content. It is a protein which helps the skin hold together giving it a firmness and elasticity.Journals A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.