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Cysteine is considered a non-essential amino acid

S100 proteins are typically symmetric dimers, and each subunit contains two helix-loop-helix EF-hand motifs that are separated by a flexible hinge region and flanked by conserved hydrophobic residues at the amino- and carboxy-terminal ends (34) ( Figure 1 )

however, long-term studies have reported promoter silencing and off-target effects in non-neuronal cells [118]

Injury occurring in the third month of gestation can form a fetal nuclear cataract, characterized by opacities located between the anterior and posterior Y-sutures, and is known as a sutural cataract

Kim C, Apel K (2013) Singlet oxygen-mediated signaling in plants: moving from flu to wild type reveals an increasing complexity