“…Concerning LDL, (1.019 < p < 1.063), our Nterminal amino acid analyses are in agreement with the data by Shore (1957) and Rodbell (1957) but not with those of Bobbitt and Levy (1965). Further, ultracentrifugation of partially delipidated LDL showed two components, 10 and 15 S, whereas Avigan (1957) and Bobbitt and Levy (1965) reported a single fraction having s values of 13 and 15, respectively. Differences in the source of serum (normal vs. hyperlipemic), techniques of delipidation or solvent medium employed for the sedimentation analyses, may have accounted for the results.…”