Restriction digests of the clone give the following sizes (kb): SacI/XbaI--5.2, 0.4; EcoRV--3.8, 1.7; PstI--3.6, 1.9. Expression from the O-acetyl homoserine sulfhydrylase (MET25) promoter is repressed when cells are grown in the presence of methionine. Low copy number shuttle expression vector. One of 32 yeast expression vectors (ATCC 87318-87349) differing in promoter, selection marker and replicon. |
