alternative yeast nuclear code alternative yeast nuclear code the alternative yeast nuclear code (translation table 12) is a genetic code found in certain yeasts. however, other yeast, including saccharomyces cerevisiae, candida azyma, candida diversa, candida magnoliae, candida rugopelliculosa, yarrowia lipolytica, and zygoascus hellenicus, definitely use the standard (nuclear) code. the code aas = ffllssssyy**cc*wlllspppphhqqrrrriiimttttnnkkssrrvvvvaaaaddeegggg starts = -------------------m---------------m---------------------------- base1 = ttttttttttttttttccccccccccccccccaaaaaaaaaaaaaaaagggggggggggggggg base2 = ttttccccaaaaggggttttccccaaaaggggttttccccaaaaggggttttccccaaaagggg base3 = tcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcagtcag bases: adenine (a), cytosine (c), guanine (g) and thymine (t) or uracil (u). amino acids: alanine (ala, a), arginine (arg, r), asparagine (asn, n), aspartic acid (asp, d), cysteine (cys, c), glutamic acid (glu, e), glutamine (gln, q), glycine (gly, g), histidine (his, h), isoleucine (ile, i), leucine (leu, l), lysine (lys, k), methionine (met, m), phenylalanine (phe, f), proline (pro, p), serine (ser, s), threonine (thr, t), tryptophan (trp, w), tyrosine (tyr, y), valine (val, v). differences from the standard code dna codonsrna codonsthis code (12)standard code (1) ctgcugser (s)leu (l) alternative initiation codons cag may be used in candida albicans. systematic range endomycetales (yeasts): candida albicans, candida cylindracea, candida melibiosica, candida parapsilosis, and candida rugosa.