NOVELTY - Composition comprises: (a) an X143 polypeptide having retrograded starch degrading activity; and (b) a sulfur-containing compound, a heterocyclic compound (reducing agent), and/or a cellobiose dehydrogenase. The X143 polypeptide is (i) a polypeptide having at least 75% sequence identity to the mature polypeptide of SEQ ID NO: 2, and (ii) a polypeptide encoded by a polynucleotide having at least 75% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 1 and/or the cDNA sequence.    USE - The composition is useful for the degradation of retrograded starch material and saccharifying a starch containing material including barley, beans, cassava, cereals, corn, milo, peas, potatoes, rice, rye, sago, Sorghum, sweet potatoes, tapioca, wheat, and/or whole grains, which is useful for producing a fermentation product including alcohol, preferably ethanol (all claimed) and butanol, organic acids (e.g. succinic acid, 3-hydroxypropionic acid (3-HP) and lactic acid), sugar alcohols (e.g. glycerol), ascorbic acid intermediates (e.g. gluconate, 2-keto-D-gluconate, 2,5-diketo-D-gluconate, and 2-keto-L-gulonic acid), amino acids (e.g. lysine), and proteins (e.g. antibodies and its fragments).    ADVANTAGE - The composition improves yield of the end product.    DETAILED DESCRIPTION - Composition comprises: (a) an X143 polypeptide having retrograded starch degrading activity; and (b) a sulfur-containing compound, a heterocyclic compound (reducing agent), and/or a cellobiose dehydrogenase. The X143 polypeptide is (i) a polypeptide having at least 75% sequence identity to the mature polypeptide of SEQ ID NO: 2, and (ii) a polypeptide encoded by a polynucleotide having at least 75% sequence identity to the mature polypeptide coding sequence of SEQ ID NO: 1 and/or the cDNA sequence. The combination of the X143 polypeptide having retrograded starch degrading activity and the sulfur-containing compound and/or a heterocyclic compound (reducing agent), and/or a cellobiose dehydrogenase, enhances degradation of retrograded starch material by the X143 polypeptide, where sequences not defined here may be found at ftp://ftp.wipo.int/pub/published-pct-sequences/publication. INDEPENDENT CLAIMS are included for:    (1) saccharifying a starch containing material, comprising (a) liquefying the starch containing material in the presence of at least an alpha amylase, and (b) saccharifying the starch containing material in the presence of an X143 polypeptide; and    (2) producing a fermentation product, comprising (a)-(b) as above per se, and (c) fermenting the saccharified starch material with one or more fermenting microorganisms to produce the fermentation product.