Table 1.

Proposed order of amino acid incorporation into genetic code, hairpin aminoacylation and stereochemical relationship with anticodon

	Amino acids in proposed order of incorporation into genetic code	Reported hairpin amino-acylation	Established stereochemical relationship with anticodon
	glycine	+
	alanine	+
	aspartic acid	+
early	valine	+
	proline
	serine	+
	glutamic acid
	threonine
	leucine		+
	arginine		codon
	asparagine
	isoleucine	+	anticodon/codon
	glutamine	+	-
	histidine	+	+
	lysine
	cysteine	+
late	phenylalanine		+
	tyrosine	+	+
	methionine	+
	tryptophan		+

Left column: proposed order of incorporation of amino acids into genetic code taken from [9]. Middle column: hairpin aminoacylation data taken from [4]. Right column: stereochemical relationship with anticodon data taken from [27]. Gaps in the table represent those examples where evidence has not been reported or established.