operon cosmids vector yac bac vector expression vector replication transcription tra structure function mitogenome golgi complex structure and fn flagella-structure cilia mechanism high histidine low histidine regulation of histidine operon assymetric replication rolling circle of replication d loop models of replication gene switched off gene switched on regulation lactose metabolism transcriptional control chromatin regulation eukaryotic gene expression gene regulation genetic material proof rna lecture notes
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