| abstract |
The protein PP17, which has (a) an electrophoretic mobility in the range between beta 1- and alpha 2-globulins, (b) an isoelectric point of 5.25+/-0.20, (c) a sedimentation coefficient S20o, w of 2.7+/-0.1 S, (d) a molecular weight, determined in polyacrylamide gel containing sodium dodecyl sulfate (SDS), of 38,000+/-2,000, (e) an extinction coefficient E1cm1% (280 nm) of 8.5+/-0.4 and (f) a carbohydrate content of 2.1+/-0.9% containing 0.3+/-0.2% of mannose, 0.4+/-0.2% of galactose, 0.2+/-0.1% of xylose, 1.0+/-0.3% of N-acetyl-glucosamine and 0.2+/-0.1% of N-acetyl-neuramin acid, is described. A process for concentrating and isolating it and its use are also described. |