similarly , a significant doubling in islet-derived mass was mainly due to a doubling of the b-cell mass as the average proportion of endocrine cells per islet shifted from 66 % , 26 % , and 18 % to 81 % , 18 % , and 3 % for b- , a- , and d-cells of control and tumor-bearing rats , respectively .
C0577559
mass
C0027651
tumor