[BiO BB] using protein databases

[l x yi]

Hi, I'm a new user of protein databases, could someone help me with a few questions?
 
1. can anyone tell me how to download 200 random sequences of length >150 from a reliable protein database?
2. For the profiles in pfam, if there are gaps between two continuoud patterns, does it make sense to search only one of the pattern? Is it correct the whole thing is a domain, and the patterns seperated by the gaps are motifs? 
3. also, in pfam, the uk site
http://www.sanger.ac.uk/Software/Pfam/data/jtml/seed/PF00047.shtml
i got results like 
PIGR_HUMAN/33-112                GNSVSITCYYP.........PTSVNRHTRKYWCR....QGARGGCITLISSEGYVSSK............YAGRANLTNF
O60667/30-106                    GGSVTIKCPLP.............EMHVRIYLC.......REMAGSGTCGTVVSTTNFIK........AEYKGRVTLKQY
TVA1_HUMAN/35-113                KEDVTLDCVYE...........TRDTTYYLFWY.......KQPPSGELVFLIRRNSFDEQ........NEISGRYSWNFQ
TVA1_MOUSE/35-112                GASLQLRCKYS............YSATPYLFWY.......VQYPRQGLQLLLKYYSGDPV........VQGVNGFEAEFS
TVA1_MOUSE/35-112-SS             TSCEEECCCEC............CSSCCEEEEE.......EECTTCCCEEEEEECSSCSE........EECTTTCEEEEE
TVA1_MOUSE/35-112-SA             43603040406............2735020000.......01275521531041246633........172675040511
TVA2_MOUSE/36-111                GARTSLNCTFS............DSASQYFWWY.......RQHSGKAPKALMSIFSNGE..........KEEGRFTIHLN
TVB1_MOUSE/35-113                GQKAKMRCIPE.............KGHPVVFWY.......QQNKNNEFKFLINFQNQEVLQ......QIDMTEKRFSAEC
TVB7_MOUSE/35-113                GQEATLWCEPI.............SGHSAVFWY.......RQTIVQGLEFLTYFRNQAPID......DSGMPKERFSAQM
TCB_FLV/44-121                   GQQVTLSCFPI.............SGHLSLYWY.......QQAVGQGPQLLIQYYNREER.......GKGNFPERFSAQQ


what does the numbers on line 6 mean? 

thanks very much.

Lily

 

 


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