( 1 ) in order to protect the nuclear rna of physarum polycephalum plasmodia during cell homogenisation and purification of the nuclei , the following conditions were used : low temperature ( -11 degrees c ) , high ph ( 8.1-8.9 ) , formaldehyde ( 2.8 % ) and spermine ( 2.3 mm ) .
C0007634
cell
C0007610
nuclei