Plaques: 0.5mm, clear-turbid, halo, ring. Inactivated after 8 years in broth at -70oC. Sensitive to chloroform. Generalized transducing phage (lytic) for QM B1551. Estimate of molecular weight (restriction fragments: 97x10^6 dalton. 20% of thymine replaced by some form of substitued HMU. Dimensions in nm (Ackermann unpubl.): UA head 93 tail 199 x 21 PT head 93 tail 199 x 15
