Table 3.

Rules for potential rG4 identification

Label	Description	Rules
G3	G3 rG4s with 1–15nt loops	G3N1–15G3N1–15G3N1–15G3
G2	G2 rG4s with 1–9nt loops	G2N1–9G2N1–9G2N1–9G2
G3B	G3 rG4s with a bulge and 1–9nt loops	G3N1–9G2HGN1–9G3N1–9G3 or G3N1–9G3N1–9 G2HGN1–9G3
G3V	G3 rG4s with guanine vacancy and 1–9nt loops	G2N1–9G3N1–9G3N1–9G3 or G3N1–9G3N1–9G3N1–9G2

Note: N represents the four bases, and H represents the bases other than G.