Protease-sensitivity of TM-MBP and TM-OmpA. TST1 transformed with
pJH28, pJH29, pHL11, or pHL12 were pulse-labeled, converted to
spheroplasts, and treated with proteinase K. MBP- and OmpA-containing
polypeptides were immunoprecipitated with anti-MBP and anti-HA
antibodies, respectively. Lanes: 1 and 2, cells producing MBP or OmpA;
3 and 4, cells producing TM-MBP or TM-OmpA. Proteinase K was added to
the samples in lanes 1 and 3.