|Endoproteases that contain proteolytic core domains and ATPase- containing regulatory domains. They are also called as endopeptidase or endoproteinase. Exopeptidase which break peptide bonds from their end-pieces. endopeptidases cannot break down peptides into monomers, while exopeptidases can break down proteins into monomers. 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.