Suppression of sec13-1 by p24 deletion mutations. Each p24 deletion mutant was crossed with a sec13-1 temperature-sensitive mutant, and segregants from a tetratype tetrad were tested for growth at different temperatures on YEPD medium. Results shown are at 25°C, a permissive sec13-1 temperature (A and D), 33°C (B and E), and 37°C (C and F), nonpermissive temperatures for sec13-1 mutants.