Hemoglobin subunit gamma-2 is a protein that in humans is encoded by the HBG2 gene.
The gamma globin genes (HBG1 and HBG2, this gene) are normally expressed in the fetal liver, spleen and bone marrow. Two gamma chains together with two alpha chains constitute fetal hemoglobin (HbF) which is normally replaced by adult hemoglobin (HbA) at birth. In some beta-thalassemias and related conditions, gamma chain production continues into adulthood. The two types of gamma chains differ at residue 136 where glycine is found in the G-gamma product (HBG2) and alanine is found in the A-gamma product (HBG1). The former is predominant at birth. The order of the genes in the beta-globin cluster is: 5' - epsilon – gamma-G – gamma-A – delta – beta - 3'.
Sometimes I feel so lost S.O.S. all my lines are crossed. I bite off more than I can chew. It's killing me its killing you there's nothing that I'd rather do. It's got me now its holding me. A sign of something good a sign I thought I'd never see. I try to keep it in my head. We'll you can kick my ass and burn your books, but it won't change a word I've said. I guess I should have seen it coming. It's in the smile on his face. Did you really think that this would be so easy? I think you made a big mistake. What went so wrong? Every action has reaction in this fucked up world that you created. Now you're head is so full of negativity and shattered dreams. A world of noise you end up hating. It's got me now it's holding me. A sign of something good a sign I thought I'd never see. I try to keep it in my head. We'll you can kick my ass and burn you're books but it won't change a word I've said. I guess I should have seen it coming. It's in the smile on his face. Did you really think that this would be so easy? I think you made a big mistake. What went so wrong it's been too long. So just take it on the chin. It's who you are and what you do. Not who you were or what you have been. There's just one thing you should know. That I still care to work it out don't think about it let it go.