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[FRNG <dan@pewdc.ibp.ac.cn>]

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Hello! colleagues

I am now bothered by a problem of heavy atom sites.

I have native data 2.0A and two derivatives datas. Derivative_1 data is 2.5A 
and it  was soaked by Na2WO4 .Derivative_2 data is 3.0A and it was soaked by K2PtI6.
We know this protein's sequence, it contains 124 aa. Its spacegroup maybe P43212 or 
P41212.

I calculate difference patterson map of derivative_1 by FFT program. After that, 
I searched for derivative_1  heavy atom site by RSPS program of ccp4 Suite. The
results are as following:

            POSNN      FRACTIONAL COORDINATES     ANGSTROM COORDINATES      SCORE    SITE
            -----     ------------------------  ------------------------  ---------  ----
              1        0.3164  0.0508  0.1172     16.87    2.71   23.38      3.44       1 
              2        0.1836  0.4492  0.1172      9.79   23.95   23.38      3.44       1
              3        0.8164  0.5508  0.1172     43.53   29.37   23.38      3.44       1
              4        0.6836  0.9492  0.1172     36.45   50.61   23.38      3.44       1
              5        0.8242  0.4453  0.1191     43.94   23.74   23.77      2.48       2
              6        0.1758  0.5547  0.1191      9.37   29.57   23.77      2.48       2
              7        0.6758  0.0547  0.1191     36.03    2.92   23.77      2.48       2
              8        0.3242  0.9453  0.1191     17.29   50.40   23.77      2.48       2
              9        0.6289  0.6289  0.0098     33.53   33.53    1.95      2.34       3

The first four peak are equivalent in intensity, I don't know which one is correct.