Animals|Base Composition|Base Sequence|Codon|DNA|Evolution, Molecular|GC Rich Sequence|Gene Silencing|Genome, Human|Humans|Introns|Molecular Sequence Data|Mutation, Missense|Nucleic Acid Conformation|Nucleic Acid Denaturation|RNA|Sequence Analysis, DNA|Sequence Analysis, RNA|Species Specificity|Structure-Activity Relationship|Temperature