HETEROGEN HET GROUPS NUMBERED 2000+ ARE ASSOCIATED WITH CHAIN A. HET GROUPS NUMBERED 3000+ ARE ...HETEROGEN HET GROUPS NUMBERED 2000+ ARE ASSOCIATED WITH CHAIN A. HET GROUPS NUMBERED 3000+ ARE ASSOCIATED WITH CHAIN B. HET GROUPS NUMBERED 4000+ ARE ASSOCIATED WITH CHAIN C. HET GROUPS NUMBERED 5000+ ARE ASSOCIATED WITH CHAIN D. HET GROUPS NUMBERED 6000+ ARE ASSOCIATED WITH CHAIN E. HET GROUPS NUMBERED 7000+ ARE ASSOCIATED WITH CHAIN F. HET GROUPS NUMBERED 8000+ ARE ASSOCIATED WITH CHAIN G. HET GROUPS NUMBERED 9000+ ARE ASSOCIATED WITH CHAIN H.