Complex sentence: For example, phosphorylation of serine residues 10 and 28 on H3 is a marker for chromosomal condensation, similarly, phosphorylation of serine residue 10 and acetylation of residue 14 on H3 is a tell-tale sign of transcription.
Split into simpler sentences: For example, phosphorylation of serine residues 10 and 28 on histone H3 is a marker for chromosomal condensation. Similarly, phosphorylation of serine residue 10 and acetylation of residue 14 on histone H3 is a tell-tale sign of transcription.