Also, CNVs in human genome affect more nucleotides than Single Nucleotide Polymorphism (SNP). Interspecific expression divergence was higher than intraspecific expression polymorphism. Gene polymorphism between species is much more diverse than the intraspecific polymorphism of lactoferrin. The baiji has the lowest single nucleotide polymorphism (SNP) frequency reported thus far among mammals. This method begins with alignment of homologous genes, followed by identification of regions of polymorphism. Polymerase chain reaction, or PCR, and restriction fragment length polymorphism, or RFLP. Thus the order exhibits both genetic polymorphism and extensive polyphenism. Gastric cancer is correlated with TATA box polymorphism. The latter example is called restriction fragment length polymorphism (RFLP). A distinction exists between structural substitution for inferred and non-inferred polymorphism. Other aggregations are also observed and form part of the polymorphism of amphiphile (lipid) behavior. These lipids vary in shape (see page on lipid polymorphism). Gilbert's syndrome is correlated with UTG1A1 TATA box polymorphism. An object is an abstract data type with the addition of polymorphism and inheritance. VBScript supports classes but not polymorphism and inheritance.