Cytochrome c1
Gallus gallus
Bos taurus
Saccharomyces cerevisiae
Rb.capsulatus
 

Two alternative alignmets for 50-80 region- structure suports first, less parsimonious alignment:
This adds three residues in turn at tip of 1st branch of Y-loop, removes 3 from second branch.
P74 is cis-proline. interface w sym-related c1 extends P74 - G78 (in vertebrates)
                                 0        10        20        30        40        50           60        70       80
                                 |         |         |         |         |         |            |         |        |
Gallus                            GELELHPPAFPWSHGGPLSALDHSSVRRGFQVYKQVCSACHSMDYVAFRNLI--G-VTHTEAEAKALAEEVEVQDGPDENGEL
Bostaurus                         SDLELHPPSYPWSHRGLLSSLDHTSIRRGFQVYKQVCSSCHSMDYVAYRHLV--G-VCYTEDEAKALAEEVEVQDGPNEDGEM
Saccharocere                   MTAAEHGLHAPAYAWSHNGPFETFDHASIRRGYQVYREVCAACHSLDRVAWRTLV--G-VSHTNEEVRNMAEEFEYDDEPDEQGNP
Rb.capsulatus                        NSNVQDHAFSFEGIFGKFDQAQLRRGFQVYSEVCSTCHGMKFVPIRTLSDDGGPQLDPTFVREYAAGLD--TIIDKDS-G
                         * * * .          .:.:*..*::..:*::.:*******.:***:**.*.:*. * * .   .: :.. : * .   *
Prim.cons.      MKKLLISAVS2L2L22GAALANSNV22222S22G22222D2222RRGFQVY22VCS2CH2M22V22R2L22222222222222E22222D2

                                  0        10        20        30        40        50        60        70       80
                                  |         |         |         |         |         |         |         |        |
Gallus                            GELELHPPAFPWSHGGPLSALDHSSVRRGFQVYKQVCSACHSMDYVAFRNLIGVTHTEAEAKALAEEVEVQDGPDENGEL
Bostaurus                         SDLELHPPSYPWSHRGLLSSLDHTSIRRGFQVYKQVCSSCHSMDYVAYRHLVGVCYTEDEAKALAEEVEVQDGPNEDGEM
Saccharocere                   MTAAEHGLHAPAYAWSHNGPFETFDHASIRRGYQVYREVCAACHSLDRVAWRTLVGVSHTNEEVRNMAEEFEYDDEPDEQGNP
Rb.capsulatus                        NSNVQDHAFSFEGIFGKFDQAQLRRGFQVYSEVCSTCHGMKFVPIRTLSDDGGPQLDPTFVREYAAGLDTIIDKDSG
                         * * * .          .:.:*..*::..:*::.:*******.:***:**.*.:*. * * .   .: :.. : * .   *
Prim.cons.      MKKLLISAVS2L2L22GAALANSNV22222S22G22222D2222RRGFQVY22VCS2CH2M22V22R2L22222222222222E22222D2
 

                        90       100       110       120                        130        140
                         |         |         |         |                          |          |
Gallus          FMRPGKISDYFPKPYPNPEAARADNNGALPPDLSYIVYARH                 XXEDYVFSLLXXYX-XPPRALWC
Bostaurus       FMRPGKLSDYFPKPYPNPEAARAANNGALPPDLSYIVRARH-----------------GGEDYVFSLLTGYC-EPPTGVSLR
Saccharocere    KKRPGKLSDYIPGPYPNEQAARAANQGALPPDLSLIVKARH-----------------GGCDYIFSLLTGYPDEPPAGVALP
Rb.capsulatus   EERDRKETDMFPTRVG----------DGMGPDLSVMAKARAGFSGPAGSGMNQLFKGIGGPEYIYRYVTGFPEENPACAPEG
                   :...   *  * :* **.   :          .: **** :.:**                  ** :*::  :**: *  .. : .
Prim.cons.      2222222222R22K22D2FP 2222222222222G222PDLS2222AR2GFSGPAGSGMNQLFKGIGG22Y22222TG22E22222222G
secondary                                                                           HHHH3HHHHH

                    150                         160       170       180       190       200       210
                      |                           |         |         |         |         |         |
Bostaurus       -EGLYFNPYFP------------------GQAIGMAPPIYNEVLEFDDGTPATMSQVAKDVCTFLRWAAEPEHDHRKRMGLKMLLMMGLLL
Saccharocere    -PGSNYNPYFP------------------GGSIAMARVLFDDMVEYEDGTPATTSQMAKDVTTFLNWCAEPEHDERKRLGLKTVIILSSLY
Rb.capsulatus   IDGYYYNEVFQVGGVPDTCKDAAGIKTTHGSWAQMPPALFDDLVTYEDGTPATVDQMGQDVASFLMWAAEPKLVARKQMGLVAVVMLGLLS
                 :* *:*  *   .:                   *.  :::::: ::****** .*:.:** :** *.***:   **::**  ::::. *
Prim.cons.      I2G2Y2N22F222222DTCKDAAGIKTTHGSWAQMAP3LFDD3VEYEDGTPAT3SQMAKDV3TFL3WAAEPEHD3RKRMGLK3V3MLGLL3
secondary        betaturn

                220       230       240
                  |         |         |
Bostaurus      PLVYAMKRHKWSVLKSRKLAYRPPK---
Saccharocere   LLSIWVKKFKWAGIKTRKFVFNPPKPRK
Rb.capsulatus  VMLYLTNKRLWAPYKRQKA---------
                :   ::  *:  * :*
Prim.cons.     3L3Y33KK3KWA33K3RK3222PPKPRK