There are many proteins like FGF1 (aFGF), FGF2 (bFGF), interleukin-1 (IL1) etc. which do not have a signal sequence.
Hai moitas proteínas como FGF1 (aFGF), FGF2 (bFGF), interleucina-1 (IL1) etc., que non teñen secuencia sinal.