In addition to the propeptide, other binding proteins are capable of regulating myostatin activity in vitro,
including follistatin [19], [21], FLRG [22], and Gasp - 1 [23].
For example, cluster 5 of the concise «Time Series», which consists of transiently induced genes around day 3 of differentiation, similarly to Global Cluster 30, contains the same transcripts, but in addition, it also
includes T - brachyury, Axin2, Mesp2, Fgf8, Wnt8a, Sp5, Sp8,
Follistatin, Mix1 and Lim1.