CEA(-), CSAp(-), colon antigen 3(+); This line is a subline of COLO 320DM. The cells are weakly positive for keratins and vimentinTumorigenecity:yes, in nude miceIsoenzyme:PGM1, 1; PGM3, 2; G6PD, B; PEP-D, 1; 6PGD, A;ES-D, 1Histopathology:adenocarcinoma; DukesSubculture:Shake flask, pour one-half of the medium into a new flask and add fresh medium to both flasks. Cells remaining attached may be removed (if desired) using a standard trypsin protocol. Subculture once per week.Split ratio:Media change:Reverse transcritase:negativeProductionserotonin; norepinephrine; epinephrine; adrenocorticotropic hormone(ACTH); parathyroid hormone