NOVELTY - An isolated nucleic acid molecule comprising: (a) a nucleic acid molecule comprising fully defined 1118-1404 bp (SEQ ID NO: not defined) given in the specification; (b) nucleic acid molecules comprising nucleic acid sequences that hybridize to the sequence identified in (a); and (c) a nucleic acid molecule comprising nucleic acid sequences that are degenerate as a result of the genetic code to the nucleic acid sequence defined in (a) and (b), is new.    USE - The isolated nucleic acid molecule is useful for preparing plant biomass for saccharification; and recombinant production of a polypeptide (all claimed). It is also useful for cell wall modification and/or degradation.    DETAILED DESCRIPTION - An isolated nucleic acid molecule comprising: (a) a nucleic acid molecule comprising fully defined 1118-1404 bp (SEQ ID NO: not defined) given in the specification; (b) nucleic acid molecules comprising nucleic acid sequences that hybridize to the sequence identified in (a) under stringent hybridization conditions and encode glycosyl hydrolase polypeptides which have 60-70% amino acid sequence identity with the amino acid sequences comprising fully defined 334-467 amino acids (SEQ ID NO: not defined) given in the specification; and (c) a nucleic acid molecule comprising nucleic acid sequences that are degenerate as a result of the genetic code to the nucleic acid sequence defined in (a) and (b), is new. INDEPENDENT CLAIMS are:    (1) a polypeptide encoded by the nucleic acid molecule above;    (2) a vector comprising the nucleic acid molecule above;    (3) an isolated cell comprising the nucleic acid molecule above or the vector of (2);    (4) a plant comprising the plant cell of (3);    (5) a seed comprising the plant cell of (3);    (6) a polypeptide encoded by the nucleic acid molecule selected from: (a) a nucleic acid molecule comprising fully defined 1118-1404 bp (SEQ ID NO: not defined) given in the specification; (b) nucleic acid molecules comprising nucleic acid sequences that hybridize to the sequence identified in (a) above under stringent hybridization conditions and encode glycosyl hydrolase polypeptides which have 60- 70% amino acid sequence identity with the amino acid sequences comprising fully defined 334-467 amino acids (SEQ ID NO: not defined) given in the specification; and (c) a nucleic acid molecule comprising DNA sequences that are degenerate as a result of the genetic code to the DNA sequence defined in (a) and (b), for use as a glycosyl hydrolase in the modification and/or degradation of plant cell walls;    (7) a method to prepare plant biomass for saccharification comprising: (a) providing the transgenic plant of (4); (b) inducing expression of the nucleic acid molecule above; and/or harvesting the plant biomass; and optionally (c) contacting the plant biomass with a protease that digests a hemocyanin polypeptide to provide a phenol oxidase polypeptide; and    (8) a method for the recombinant production of a polypeptide comprising: (a) providing a prokaryotic cell of (3); (b) culturing the cell under cell culture conditions conducive to the production of the polypeptide; and optionally (c) isolating the polypeptide from the cell or cell culture.