In 25 papers from a European workshop in London, England, April 1992, cell biologists explore how the microinjection of defined material can be used to manipulate the fundamental biochemistry of specific living cells. The techniques described tend to be highly sophisticated and highly expensive, so

Individual cells behave in surpnsmg ways that cannot be deduced from the averaged results of an organ as assessed by the use of conventional biochemical methods. Thus multicellular plant and animals systems are being investigated by an increasing array of histochemical and cytochemical techniques based on general chemical or specific immunological interactions to identify structural materials and to assess biological activities. In recent years there has been an increasing range of fluorescent probes, along with advanced computerised imaging and analysis techniques, which allows the behaviour...