Althalus

Dear all, I am currently using the Pubmed SNP database for my literature review. However, I got very confuse with information presented to me. Each SNP has their own unique rs number, but how come when I keyed in an rs number, there are so many HGVS names for it? and they are all so different. For example rs4680 for COMT gene. there are 14 HGVS names NC_000022.11:g.19963748G>A NG_011526.1:g.27009G>A NM_000754.3:c.472G>A NM_001135161.1:c.472G>A NM_001135162.1:c.472G>A NM_007310.2:c.322G>A NP_000745.1:p.Val158Met NP_001128633.1:p.Val158Met NP_001128634.1:p.Val158Met NP_009294.1:p.Val108Met Would be glad if someone can enlighten me. Thank you so much