ERS? ; NEEL ET AL. 264 RESULTS i Polymorphisms Genetic polymorphisms were observed in six of the systems: haptoglobin, phosphoglucomutase-1, adenosine deaminase, acid phosphatase, 6-phosphoglucose de- hydrogenase, and group specific component. Phenotype and allele frequencies are given in table 2, Because of extensive inter-island population movement since the TABLE 2 Grn FREQUENCIES For Stx GesEtic PotysronpHisiss Iw THE MARSHALL ISLANDS PeENOTY?E Adenosine deaminase ........ I 1974 1975 0 324 48 0 114 76 69 81 2 20 190 150 22 1974 1975 56 43 4 87 o31 53 99 181 84 1974 158 25 46 1 4 295 71 5 AEB B 1974 1975 ........ eewenes Total ...cccccecccccesace Phosphoglucomutase-It ...... 1975 Total ...... cece eeee eae 137 A Acid phosphatase ............ 1974 1975 Total .... 2... ceca eens 6-Phosphogiuconate dehy- drogenase ..........eceeeee 1974 1975 Total oo. ccc cece een cees 101 73 55 12 221 128 23 164 21 0 344 28 0 7 Gene Frequency 372 ADA! = 935 362 Gel = .732 364 Hpi = S21 371 FGMit == 891 372 ACPA = .766 372 6PGD4 = .962 . 11 120 180 Tora. 0 30 Total .........cceesceees Haptoglobin* 18 2 137 . Total 2... 2. .eeefa eeeeeen Group specific component .... 167 z-4 0 * The Hp® type was observed in four individuals, t Two ezamples of the PGM phenotype 2-7 and 2 single phenotype 1-7 were observed. Bikini incident, results are not presented separately by island. Varying numbers of determinations for the systems listed in tables 1 and 2 are due to a considerable time lapse between collection of the samples and their receipt in the laboratory. As a consequence, either no pattern or an unclear pattern (even after repetition) was occasionally obtained for a given trait. Three persons had the PGM; 7 phenotype. Because of the occurrence of this variant in polymorphic proportions elsewhere in J012007 Shh cake + RBae Oh, Systrx