              Data items in the ENTITY_SRC_GEN category record details of\
               the source from which the entity was obtained, in those cases\
               where the source was a genetically manipulated one.  The\
               following are treated separately:  Items pertaining to the tissue\
               from which the gene was obtained, items pertaining to the host\
               organism for gene expression and items pertaining to the actual\
               producing organism (plasmid).