File Name : supplementry figure 1.tif Caption : contents of pigment r-phycoerythrin (r-pe) and r-phycocyanin (r-pc) with 10-50% ammonium sulphate precipitation. File Name : supplementry figure 2.tif Caption : e. coli grown in nutrient broth supplemented with commercial agar and agar extracted from different agarophytes. a, 1.5% bacto agar, b, 1.5% g. dura agar, c, 0.75% g. acerosa agar , d, 0.75% g. pusillum agar. File Name : supplementary figure 3.tif Caption : hplc chromatogram of a) standard glucose, b) algal hydrolysate (36 h), c) whatmann filter paper hydrolysate (36 h) and d) whatmann filter paper hydrolysate (60 h).