The diagram illustrates the key stages of protein synthesis in a eukaryotic cell. It begins with transcription to produce pre-mRNA in the nucleus (1), followed by post-transcriptional modification (2) ...
Department of Cell and Molecular Biology, Medical Nobel Institute, Karolinska Institutet, Box 285, SE-17177 Stockholm, Sweden Salivary gland cells in the larvae of the dipteran Chironomus tentans ...