The fine structure of a nucleolar constituent.
D000230:Adenocarcinoma; D002460:Cell Line; D002466:Cell Nucleolus / Q000032:analysis*; D006651:Histocytochemistry; D006801:Humans; D008854:Microscopy, Electron; D009363:Neoplasm Proteins / Q000032:analysis; D010434:Pepsin A; D012260:Ribonucleases; D014357:Trypsin
D009363:Neoplasm Proteins; D012260:Ribonucleases; D014357:Trypsin; D010434:Pepsin A