abnormal replication fork arrest at mating-type locus reversed RTS1 barrier polarity midori FYPO:0005360 A cellular process phenotype observed in the vegetative growth phase of the life cycle in which the RTS1 replication termination site prevents replication fork movement in the opposite of normal direction. Normally, RTS1 acts as a barrier to replication forks moving in the cenII-distal direction. 2016-04-11T15:40:34Z reversed RTS1 barrier polarity during vegetative growth reversed RTS1 barrier polarity during mitotic cell cycle