title: Gene 67, a new, essential bacteriophage T4 head gene codes for a prehead core component, PIP. II. The construction in vitro of unconditionally lethal mutants and their maintenance.
mesh_terms: D000595:Amino Acid Sequence; D005804:Genes, Lethal; D005814:Genes, Viral; D005816:Genetic Complementation Test; D008854:Microscopy, Electron; D009024:Morphogenesis; D009154:Mutation; D010455:Peptides / Q000032:analysis; D014176:Protein Biosynthesis; D011498:Protein Precursors / Q000096:biosynthesis*; D013604:T-Phages / Q000235:genetics* / Q000502:physiology / Q000648:ultrastructure; D014758:Viral Core Proteins; D014764:Viral Proteins / Q000096:biosynthesis*
chemical_list: D010455:Peptides; D011498:Protein Precursors; D014758:Viral Core Proteins; D014764:Viral Proteins