The invention provides a nucleotide sequence comprising at least a portion of the nucleotide sequence of FIG. 10A, FIG. 6B or FIG. 10A or FIG. 10B; nucleotides which hybridise to the nucleotide sequences of FIG. 6A, FIG. 6B or FIG. 10A or FIG. 10B; nucleotides which are degenerate to the nucleotide sequences of FIG. 6A, FIG. 6B or FIG. 10A or FIG. 10B; all of which nucleotides encode a polypeptide having transglutaminase activity
