unusual structures , including blocks of at-rich and gc-rich segment sections and symmetric regions in the dna near the origin of dna replication , have been demonstrated and the distribution of stretches of 6 or more deoxyadenylic acids in the dna of sv40 is consistent with some rho for these sequences in animal cells , either as terminators of transcription or as sites where degradation of transcripts is initiated or sites related to the selective rejection or degradation of transcipts .
C0242961
origin of dna replication
C0007634
cells