Inability of isoquinoline derivatives to inhibit virus neuraminidase activity.

The Selective Release of Proteins from a Bovine Enterovirus. By S. J. MARTIN and M.D. JOHNSTON Haemagglutinin Relationships of Hong Kong(H3) and Asian(H2) Influenza Strains Delineated by Antigen-specific Recombinants. By W.R. DOWDLE, W. M. MA~NE, M. COLEMAN and V. KNEZ The Kinetics of Haemagglutination by Semliki Forest Virus: a New Sedimentation-enumeration Method. By K. R. CAMERON and C. J. BRADISH Electron Microscopy of Maize Rough Dwarf Virus Assembly Sites in Maize. Cytochemical and Autoradiographic Observations. By M. BASSI and M. A. FAVALt The Structure of Single-stranded Virus RNA in situ. A Study of Absorption Spectra and Optical Rotatory Dispersion of Tobacco Mosaic Virus and Potato Virus X Preparations. By E. N. DOBROV, S. V. KVST and T. I. TITCHONENKO Heterogeneity in the Phospholipid Content of Purified Rabies Virus (EPJ, Strain) Particles. By F. SOKOL, H. F. CLARK, E. GY6RGY and N. TOMhSSINI Biochemical Changes during Mixed Infections with Bacteriophages T2 and T4. By N. MhmaOOD and M. R. Ltn~T Relationship Among Temperate Agrobacterium Phage Genomes and Coat Proteins. By J. DE LEY, M. GILLIS, C. F. POOTJES, K. KERSTERS, R. TYTGAT and M. VAN BRAEKEL Ultrastructure of Mycoplasmatales Virus laidlawii I. By J. BRUCe, R. N. GOURLAY, R. HULL and D. J. GARWES . Defective Mouse Sarcoma Virus Deficient in DNA Polymerase Activity. By J. T. MAY, K. D. SOMERS and S. KIT .