1. Changes in the perfusate activities of aspartate transaminase, lactate dehydrogenase, its ‘LD-5’ component, sorbitol dehydrogenase, ornithine carbamoyltransferase, and the isoenzyme patterns of lactate dehydrogenase and aspartate transaminase, were investigated in eleven perfusions of pig liver with human blood in order to assess liver cell damage during perfusion. 2. The aspartate transamin...