Evidence suggesting a non-random character to nucleotide replacements in naturally occurring mutations.
D000225:Adenine / Q000378:metabolism; D000595:Amino Acid Sequence; D003580:Cytochromes / Q000096:biosynthesis; D003596:Cytosine / Q000378:metabolism; D005815:Genetic Code; D006147:Guanine / Q000378:metabolism; D006455:Hemoglobins, Abnormal / Q000096:biosynthesis; D006801:Humans; D066298:In Vitro Techniques; D008967:Molecular Biology; D009154:Mutation; D011119:Polynucleotides / Q000378:metabolism*; D014498:Uracil / Q000378:metabolism
D003580:Cytochromes; D006455:Hemoglobins, Abnormal; D011119:Polynucleotides; D014498:Uracil; D006147:Guanine; D003596:Cytosine; D000225:Adenine