... constituent of the thin filaments of muscle and of the microfilaments found in practically all eukaryotic cells – itcomprises 5 10% of the protein of such cells (see actin filament). Insolutions of ... decade since the first edition of the Oxford Dictionary of Biochemistry and Molecular Biology. It was a remarkable work of scholarship, arising from the work of journal editors and scientific writers. ... enlargement of the bones of the hands, feet, head, and chest with thickening of the skin, lips, and vocal chords. It is caused by excessive secretion of, or increased sensitivity to, somatotropin, and...