g-band

• In addition , there exists 72 . 2 % of the chromosome surface positively stained with r - banding . 4 . complementarity of g - and r - banding pattern it is generally accepted that chromosome banding patterns appear closely related to differences in dna base composition , and r - bands correspond to gc - rich dna and g - bands to at - rich dna
  4 . g 、 r带型的互补性一般认为，染色体的带纹与其碱基组成密切相关， r阳性带对应于gc含量丰富的区域， g阳性带则对应于at含量丰富的区域。