This tag is for questions concerning biochemical methods (e.g. electrophoresis) or those concerning biochemical mechanisms or research. Do not use this tag if your question is merely about compounds often used in areas related to biochemistry or associated with these. These may fall under organic chemistry or the appropriate compound’s functional groups’ tags.
Questions that are related to any living organism should have this tag. However, chemicals that are needed in life, e.g. proteins, enzymes, etc. can also have this tag, provided that the question being asked is concerned with how these proteins, enzymes, etc. affect living organisms.