hepg2 cells and fibroblasts , two cell types showing only the constitutive pathway of secretion , and pc12 cells , which show both the constitutive and the regulated pathway of secretion , were subjected to pulse-chase and/or long-term labelling with [ 35s ] sulfate and [ 3h ] tyrosine , followed by analysis of proteins in the cells and medium .
C0016030
fibroblasts
C0007634
cells