( ( Staining ( in ( all embryos ) ) ) ( ( ( is specifically ) ( ( ( detected ( in ( pole cells ) ) ) , ) ( ( as soon ) ( as ( they form ) ) ) ) ) . ) )
(ROOT (S (S (VP (VBG Staining) (PP (IN in) (NP (DT all) (NNS embryos))))) (VP (VBZ is) (ADVP (RB specifically)) (VP (VBN detected) (PP (IN in) (NP (NN pole) (NNS cells))) (, ,) (ADVP (ADVP (RB as) (RB soon)) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP form))))))) (. .)))
Staining in all embryos is specifically detected in pole cells, as soon as they form.
(ROOT (S (NP (PRP We)) (ADVP (DT all)) (VP (VP (VBP start) (PP (IN as) (NP (DT a) (JJ single) (NN cell)))) (CC and) (VP (ADVP (RB soon)) (VBP grow) (PRT (RP into)) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN embryo)))) (. .)))