단백질 ≫ 아미노산 ≫ 아미노산 합성

글리신 Glycine

- Gluamic acid, glutamine
- Aspartic acid, asparagine
- serine, threonine,  glycine, valine
- alanine, leucine, isoleucine
- lysine, arginine, histidine, proline
- methionine, Cysteine
- Tyrosine, Phenylalanie, Tryptophan

일반적으로 식물성 단백질에는 거의 함유되어 있지 않으나,  동물성 단백질에는 다량으로 함유, 견사(絹絲) 피브로인에는 40.7%, 젤라틴에는 25.5%가 함유
  - 옥시토신이나 바소 프레신 등의 호르몬, 글루타티온 등 단백질의 각 구성 성분
  - 동물체 내에서는 세린과의 상호전환 반응에 의해 합성되며, 글리옥실산 에 글루탐산 또는 글루타민이 아미노기 공급원이 되어 글루신을 생성

 

In higher eukaryotes, D-Aminolevulinic acid, the key precursor to porphyrins, is biosynthesized from glycine and succinyl-CoA. Glycine provides the central C2N subunit of all purines.[10]
  
Glycine is an inhibitory neurotransmitter in the central nervous system, especially in the spinal cord, brainstem, and retina. When glycine receptors are activated, chloride enters the neuron via ionotropic receptors, causing an Inhibitory postsynaptic potential (IPSP). Strychnine is a strong antagonist at ionotropic glycine receptors, whereas bicuculline is a weak one. Glycine is a required co-agonist along with glutamate for NMDA receptors. In contrast to the inhibitory role of glycine in the spinal cord, this behaviour is facilitated at the (NMDA) glutaminergic receptors which are excitatory.[citation needed] The LD50 of glycine is 7930 mg/kg in rats (oral),[12] and it usually causes death by hyperexcitability.

There is some evidence showing that 3000 milligrams of glycine before bedtime improves sleep quality