Fig. 5. A comparison of the protein composition between different organs, revealed by gel electrophoretic separation. Proteins were extracted from coelomic epithelia (lane 1), axial organ (lane 2), coelomocytes (lane 3), pyloric caeca (lane 4) and Tiedemann body (lane 5). Note the similar protein composition pattern between coelomocytes, coelomic epithelia and Tiedemann body; the axial organ showed a similar pattern but a higher density of some protein bands. Pyloric caeca showed the most different protein pattern compared with coelomocytes. Protein molecular masses, as approximated from markers, are shown in kDa on the left.