#Id: 3505
#Unit 2. Cellular Organization
Parity rules by Erwin Chargaff
Rule of complementarity (First parity rule)
Rule of Equal amount applies more closely to introns than to exons (Second parity rule)
Cluster rule – Purines in nontemplate strand applies more closely to Exons (Third parity rule)
GC Rule- GC content tends to be greater in exons than in introns (Fourth parity rule