医学慕课-Occurrence of heavy chain of 7S IgM <font color='red'>half</font>-molecule who<font color='red'><font color='red'>s</font></font>e NH2-terminal <font color='red'><font color='red'>s</font></font>equence i<font color='red'><font color='red'>s</font></font> identical with that of kappa light chain <font color='red'><font color='red'>s</font></font>equence in patient<font color='red'><font color='red'>s</font></font> with Walden<font color='red'><font color='red'>s</font></font>trom macroglobulinemia.