we analyzed the distribution of two basement membrane components , laminin and type iv collagen , in human reactive and neoplastic lymphoid follicles by using immunoenzymatic and immunofluorescence methods on serial frozen sections from 11 reactive lymph nodes , three palatine tonsils , and 11 immunophenotypically defined b cell non-hodgkin 's lymphomas .
C0004799
basement membrane
C0022984
laminin