FIG. 2.

SSCP pattern of four clones from each of four samples (gels 1 to 4) compared to four different samples from the four different thalli run on the same gel (gel 5). The fact that all clones show a similar pattern indicates that each PCR product contains only one intron type. Samples B and C (P. aphthosa and P. membranacea living in close contact in the field) resulted in PCR products of very similar size, but they could be shown to be different by SSCP. N.a, N. arcticum; P.a, P. aphthosa; P.m, P. membranacea; P.c, P. canina.