3.1.2.23 16000 - 4 * 16000, determined by gel filtration 690642 3.1.2.23 16000 - 4 * 16000, SDS-PAGE 780, 781 3.1.2.23 16107 - 4 * 16107, calculation from nucleotide sequence 780 3.1.2.23 62000 - native protein, determined by gel filtration 690642 3.1.2.23 66000 - gel filtration 780, 781