The distribution of LH types in some North Indian populations.

Results of a twin study on the distribution of LH (a new red blood cell membrane specificity) and ABO blood types have been reported among the Jat Sikh, Khatri, Ramdasia and a sample of mixed Punjabis from North India. The LH types are distributed bimodally, albeit with varying frequencies, in individuals with blood types other than O, in whom only the LH+ type occurred. The results suggest that the LH system could be usefully employed in population genetic studies, particularly in association with the ABO system.