FIG 1 .

Mycobacteriophage Patience virions. (A) Electron micrograph of Patience virions. Bar, 100 nm. (B) SDS-PAGE of Patience virions (V) and marker proteins (M). The three most abundant proteins likely correspond to the major tail subunit (gp31), the capsid subunit (gp23), and gp15, with predicted molecular masses of 30.5 kDa, 35.3 kDa (after processing), and 32 kDa, respectively. The major tail subunit may migrate slower than its predicted mass, as observed in some other phages (37). Numbers at right are molecular masses in kilodaltons.