Abstract: | Heavy mitochondrial preparations of bean, cauliflower,and rat liver have been found to give unimodal distributionfor electrophoretic mobility against number of particles. ThepH-mean mobility curves were similar in form and consistentwith the mitochondrial surfaces being lipoproteins. de Duve (1959) separated heavy and light(lysosome-rich) mitochondrial fractions from rat liver. Microelectrophoreticstudies on similar heavy and lightmitochondrial preparations from rat liver have shown the latterto consist mostly of mitochondria with some faster-moving particlestentatively identified with de Duve's lysosomes. Lightmitochondrial preparations of bean showed no evidence of particlesadditional to mitochondria. |