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J Virol. 1970 October; 6(4): 445-454
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Isolation and Characterization of Two Basic Internal Proteins from the T-Even Bacteriophages ¹

Department of Microbiology, University of Colorado Medical Center, Denver, Colorado 80220

ABSTRACT

Two species of basic internal proteins were found in osmotic shock supernatant solutions of bacteriophages T4B, T4D, T2H, T2L, and T6. The major species of protein isolated had a molecular weight of approximately 21,000 daltons, whereas the minor protein molecular weight was near 9,500 daltons. The two protein species exhibited unique isoelectric points and amino acid compositions. The 21,000-dalton protein of T2L showed major electrophoretic and compositional differences from the other 21,000-dalton proteins isolated. Similarities between the 21,000-dalton proteins and phage lysozyme are discussed.

¹ Presented by the senior author in partial fulfillment of the requirements for the Ph.D. degree to the Department of Microbiology, University of Colorado Medical Center.