A schematic representation of the role of SNP in gene function that can influence enzyme activity by changing amino acids. Met, Methionine; Ala, Alanine; Ser, Serine; Ile, Isoleucine; Leu, Leucine, Val, Valine; Tyr, Tyrosine; Arg, Arginine; Gly, Glycine; Glu, Glutamic acid and Thr, Threonine. This concept is taken from Jang et al. (2015) with modification