Table 4.

Sequence retrieval and processing for SILVA 91

	SSU Parc	LSU Parc
Candidates	900 573	417 217
<300 Bases	320 327	297 218
>2% Ambiguities	8018	2193
>2% Homopolymers	19 240	4772
>5% Vector contamination	14 973	2573
Insufficient relatives	49 063	13 081
<300 Gene bases	25 961	7510
<30 Alignment quality or base pair score	6583	3390
Total sequences in Parcs	461 823	85 689